Abstract: A phase shifter for adjusting a phase shift between an input signal and output signal of the phase shifter includes: a first signal path between the input and the output; a second signal path between the input and the output; and a phase-shifter circuit configured to shift a phase of a first signal of the first signal path and a phase of a second signal of the second signal path by a constant phase angle relative to each other. The first and second signal paths each comprise a voltage-divider circuit connected to its respective signal path and configured to adjust an amplitude of a signal of the respective signal path. The output signal is based on a combination of the first signal and the second signal.

Abstract: Some techniques and apparatuses described herein provide reporting of multiple feedbacks for a same transport block (TB) or a same code block group (CBG) of a signal, such as a physical downlink shared channel. Thus, in case of a failure to decode a signal via a first set of antennas, a user equipment (UE) can perform a second decoding attempt via a second set of antennas (before or after transmitting first feedback). The UE may report a result of the first decoding attempt in a first feedback, and may report a result of the second decoding attempt in a second feedback. Some techniques and apparatuses described herein also provide soft feedback (e.g., information other than a binary acknowledgment (ACK) or negative ACK (NACK)) for a transmission, such as information indicating whether a second attempt to decode the transmission is likely to be successful.

Abstract: A method for detecting the environment of a motor vehicle utilizing a radar sensor includes bringing about frequency modulation with a controllable oscillator and generating a sequence of transmission-frequency-modulated transmit signals, which each have the same nominal frequency profile. Received signals reflected from objects are evaluated such that an actual profile of the transmission frequency within the transmit signals or a deviation of the actual profile from the nominal frequency profile is established. Depending on an actual profile and/or a deviation determined, correction in the driving of the oscillator and/or correction in the evaluation of the received signals and/or adaptation of the driver assistance function and/or the autonomous driving maneuver function up to and including disabling thereof are performed.

Abstract: A peak detector including an input transistor, an isolation transistor, at least one load transistor, a buffer, a control transistor, a current source and at least one resistor. The isolation transistor isolates the input and load transistors from the supply voltage for power supply rejection. The buffer, control transistor, current source and resistor(s) bias the input transistor to remain in a saturation region and each load transistor to remain in a triode region. The buffer may be a unity gain buffer. The control transistor may match each load transistor with matching threshold voltages. An input bias circuit may be included to bias an input node to a direct-current voltage. The load transistor(s) may be biased to have so that the output voltage is proportional to a peak voltage of the input node. The peak detector may be configured to detect multiple inputs and may have shared circuitry.

Abstract: An integrated circuit includes a bit slicing circuit with a processing circuit. The processing circuit receives discrete frequency power estimates based on an S-FSK waveform received by an S-FSK receiver associated with the bit slicing circuit. The discrete frequency power estimates are representative of digital logic levels in a series of data frames modulated using S-FSK to form the S-FSK waveform. Each data frame including at least one word. Each word includes bit periods. The processing circuit receives SNR parameters that represent a dynamic SNR for the respective discrete frequency power estimates in relation to the series of data frames. The processing circuit selects a bit slicing technique from a set of available bit slicing techniques to generate data bit values for bit periods of the discrete frequency power estimates based on the SNR parameters. A method for performing bit slicing in an S-FSK receiver is also disclosed.

Abstract: An analog signal input circuit with a first number of analog signal detection channels and a diagnostics circuit, with each analog signal detection channel including a third number of analog signal detection circuits and a first connection selection device, and each analog signal detection circuit comprising a first connection device and a second connection device. For each analog signal detection channel, for detecting analog input signals applied at analog signal inputs from a second number of analog signal inputs, and for the respective issuance of output signals for the detected analog input signals, respectively one analog signal detection circuit is alternatingly selected for a certain period of time, not connected to its first connection device comprising an analog signal input for detecting an analog input signal, but used for testing and/or diagnostic purposes.

Abstract: Systems and methods for antenna switching without using a radio-frequency switch are provided. A signal received via a first antenna is digitized to form a first digital received signal. A signal received via a second antenna is digitized to form a second digital received signal. A switch selects the first digital received signal or the second digital received signal to be supplied to a modem to be demodulated. The switch may also supply a digital transmit signal from the modem to be supplied to digital-to-analog converters to and then transmitted using the first or second antenna. Additionally, when the modem is demodulating the signal received via the first antenna, another modem may be demodulating the signal received via the second antenna and vice versa.

Abstract: The present invention concerns a method and associated apparatus for reducing the time required to scan an incoming satellite transmission power spectrum for available signals and to determine the characteristics of those signals. The frequency range of interest is scanned in narrow slices to determine approximate input power within each slice. Center frequencies and symbol rates of individual transponders are then estimated based upon these input power approximations.

Abstract: A method of and apparatus for detecting signal features including amplitude, phase and timing of recognizable input signals in a frequency band or spectrum of interest. One or more super-regenerative oscillators are provided, each having a center frequency and each detecting signal features of recognizable input signals in the frequency band or spectrum of interest during multiple, successive time slots. The center frequency of each of the one or more super-regenerative oscillators is varied between time slots in a selected sequence, preferably according to a Segmentlet algorithm. The one or more super-regenerative oscillators extract the signal features of each the recognizable input signals in different time slots and/or in different super-regenerative oscillator and with a different time-slot associated center frequency associated with the one or more super-regenerative oscillators, thereby providing a time-frequency-amplitude map of the frequency band or spectrum of interest.

Abstract: An integrated circuit comprising processing logic for operably coupling to radio frequency (RF) receiver circuitry arranged to receive a wireless network signal. The receiver circuitry generates in-phase and quadrature digital baseband representations of the wireless network signal. The processing logic determines quadrature (I/Q) imbalance of the RF receiver circuitry based on the in-phase and quadrature digital baseband representations of the wireless network signal.

Abstract: Disclosed herein is a demodulator, including: a splitting/matching section for carrying out a matching process of making the amplitude and phase of a first modulated signal match respectively the amplitude and phase of a second modulated signal; and a demodulation section for generating a demodulated signal on the basis of the first modulated signal and the second modulated signal, which have been subjected to the matching process carried out by the splitting/matching section, wherein the splitting/matching section has a splitting section, a first matching section, and a second matching section, the first circuit-element constants determining the first input impedance of the first matching section and the second circuit-element constants determining the second input impedance of the second matching section are set at values determined in advance in order to make the first input impedance equal to the second input impedance.

Abstract: A wireless transmit/receive unit (WTRU) includes circuitry configured to receive information from a base station indicating an assignment of periodic time slots to transmit sounding signals and circuitry configured to transmit sounding signals to the base station in the assigned periodic time slots in response to the received information, wherein a timing of transmission of the sounding signals in response to the received information differs between a time division duplex mode and a frequency division duplex mode, and wherein the transmitted sounding signals are distinguishable from sounding signals from other WTRUs.

Abstract: The envelope detector for detecting an envelope of a digital modulation signal in accordance with an embodiment of the present invention, includes: a mixer configured to receive the digital modulation signal and output a square signal squaring the digital modulation signal when being applied with bias voltage; a bias voltage applying unit configured to apply the bias voltage to the mixer; and a DC blocking capacitor configured to be connected to the mixer to block DC component included in the square signal. In accordance with the embodiment of the present invention, it is possible to provide the envelope detector having the simple structure while having the good receiving sensitivity and the wide dynamic range characteristics and detect the envelope of the modulated signal without transmitting the carrier signal in the transmitter and generating the separate signal in the receiver, thereby saving the costs consumed to implement the transceiver.

Abstract: A RF distribution system determines its configuration and verifies the consistency of the determined configuration. Based on a device identifier, the RF distribution system may individually instruct each RF component to provide a generated signal. Consequently, a first RF component may modulate a signal on a first port. If a second RF component detects a modulated signal on a second port, then the RF distribution system deems that the two RF components are connected together. The procedure may be repeated for the remaining RF components so that the RF configuration of the RF distribution system may be determined. The determined RF configuration may be further verified for operational consistency. The RF distribution system may also scan a RF spectrum, determine a set of frequencies that provides RF compatibility with the RF distribution system based on the scanning, and configure the RF components in accordance with the set of frequencies.

Abstract: A receiver includes an antenna unit that is able to receive a transmission signal from a subject alternately at different reception levels. A wave detection unit wave-detects the transmission signal to generate a detection signal. The detection signal has a signal level that becomes fixed in accordance with the transmission signal when the antenna unit receives the transmission signal at a reception level greater than or equal to a reception limit, and the signal level of the detection signal becomes non-fixed when the antenna unit receives the transmission signal at a reception level that is less than the reception limit. A correction unit removes, when the detection signal includes a fixed value session and a non-fixed value session, the non-fixed value session and corrects the signal level of the non-fixed value session to a level equivalent to the signal level of a fixed value session.

Abstract: A virtual Weaver architecture filter is implemented using a sampling mixer that successively processes samples of the input signal in round-robin fashion and provides a sum of the samples as multiplied by coefficients emulating quadrature sinusoidal waveforms. A virtual rather than actual local oscillator is reliably implemented without mismatch. Filtering between the Weaver mixers is eliminated in favor of filtering at the sampling input and effective time division multiplexing is achieved by selecting between resistor combinations that implement different scaling coefficients, resulting in an efficient analog implementation of a virtual Weaver architecture.

Abstract: A printed circuit board (PCB) includes multiple receiving components and a sending component. Each receiving component includes a receiving unit and a first control unit. The receiving unit receives a radio signal. The first control unit is configured with a first comparison table storing related information of the receiving component, and used for decoding the radio signal according to the first comparison table, to obtain a corresponding control signal. The sending component includes a sending unit and a second control unit. The sending unit sends the radio signals. The second control unit is configured with a second comparison table storing the related information of the receiving components. When the sending component outputs the control signals through the second control unit, the second control unit generates the control signals according to the second comparison table, and encodes the control signals to generate the radio signals.

Abstract: A high temperature communications circuit includes a power conductor for concurrently conducting electrical energy for powering circuit components and transmitting a modulated data signal, and a demodulator for demodulating the data signal and generating a serial bit stream based on the data signal. The demodulator includes an absolute value amplifier for conditionally inverting or conditionally passing a signal applied to the absolute value amplifier. The absolute value amplifier utilizes no diodes to control the conditional inversion or passing of the signal applied to the absolute value amplifier.

Abstract: An RF signal reception device including: a transposition device of signals of frequency fRF to a first intermediate frequency IF1<fRF; a first bandpass filter centered on IF1; a sampler at a frequency fs<IF1; a second discrete-time filter centered on a second intermediate frequency IF2=?·fs/M+fs/(M·n); a decimation device of a factor M; an analog-digital convertor to operate at a frequency fs/M; where ?, n and M are strictly positive real numbers chosen such that: ?<fs/(2·BWch·M), and BWch/2<fs/M·n), with BWch: bandwidth of a channel of the received RF signals.

Abstract: A data reception apparatus configured to discharge, prior to receiving data from an energy receiving apparatus, energy stored in a source resonator during a mutual resonance between the source resonator and a target resonator, and demodulate data received from the energy receiving apparatus based on an amount of energy reflected from the target resonator after the energy stored in the source resonator is discharged.

Abstract: A receiver system and a demodulator system are configured to receive and demodulate, respectively, multi-gigabit millimeter wave signals being wirelessly transmitted in the unlicensed wireless band near 60 GHz.

Abstract: A baseband receiver, consisting of a receiver input port, configured to receive a baseband signal generated in response to electrical activity in tissue of a human patient. The receiver includes a modulator, configured to modulate a local oscillator signal with the baseband signal, and an isolating device configured to receive the modulated local oscillator signal at an input port of the device and in response to generate a modulated output local oscillator signal at an output port of the device. The receiver further includes a demodulator configured to demodulate the modulated output local oscillator signal with the local oscillator signal so as to recover the baseband signal.

Abstract: Methods and apparatus are provided for receiving a first signal and generating an output signal indicative of radio data system (“RDS”) information. A receiver circuit of the invention can include mixer circuitry, lowpass filter circuitry, downsampler circuitry, and decoder circuitry. Advantageously, the receiver circuit can operate entirely within the digital domain, promoting interoperability with digital frequency modulation (“FM”) demodulator circuitry.

Abstract: The electronic circuit includes a first comparator and a second comparator in which an induced electromotive force of a coil are compared with each of a first reference potential and a second reference potential and which output a pulse signal in accordance with conditions; the first signal processing circuit which outputs a first receiving rectangular wave signal and a first error signal in accordance with conditions of the pulse signal output from the first comparator and in which data held in accordance with conditions of pulse signal output from the second comparator is reset; and the second signal processing circuit which outputs a second receiving rectangular wave signal and a second error signal in accordance with conditions of the pulse signal output from the second comparator and in which data held in accordance with conditions of pulse signal output from the first comparator is reset.

Abstract: In a digital receiver, an ADC converts an analog RF signal to a digital RF signal at a sample rate of fADC, which is converted into M parallel streams of RF samples. Each stream has a sampling rate of fADC/M, where M is a positive integer greater than 1. After translation into M parallel streams of IF samples centered about an IF of fADC/4, they are demodulated by applying first coefficients to even IF samples to produce even demodulated samples and applying second coefficients to odd IF samples to produce odd demodulated samples. The even samples are filtered using first filter coefficients and the odd samples are filtered using second filter coefficients to produce a complex baseband signal.

Abstract: In a digital receiver, an ADC converts an analog RF signal to a digital RF signal at a sample rate of fADC, which is converted into M parallel streams of RF samples. Each stream has a sampling rate of fADC/M, where M is a positive integer greater than 1. After translation into M parallel streams of IF samples centered about an IF of fADC/4, they are demodulated by applying first coefficients to even IF samples to produce even demodulated samples and applying second coefficients to odd IF samples to produce odd demodulated samples. The even samples are filtered using first filter coefficients and the odd samples are filtered using second filter coefficients to produce a complex baseband signal.

Abstract: An electronic device includes an adjustable filter with a first filter element, and a second filter element coupled to the first filter element. The second filter element includes a field effect transistor (FET) including a source terminal, a drain terminal, and a gate terminal. The source terminal and the gate terminal are coupled to a reference voltage. A control circuit is coupled to the drain terminal and is configured to apply a control voltage thereto to vary a capacitance between the source and drain terminals to adjust the adjustable filter.

Abstract: Systems and methods are provided for a broadband, closed-loop RF transmitter for multi-band applications that employs a single RE path to service multiple bands of operation. Embodiments of the present disclosure implement a broadband impedance matching module, which avoids the need for several costly and complex narrow-band matching networks. In an embodiment, the broadband impedance matching module includes concentric, mutually coupled inductors. By adding this broadband impedance matching functionality, delay is significantly reduced because a single path can be used to service multiple bands.

Abstract: In a receiver, a synchronization circuit (MIX2, C1, R1, VCO) provides a set of oscillator signals (OSI, OSQ, OSX, OSY) that are synchronized with a carrier of an amplitude-modulated signal. The set of oscillator signals (OSI, OSQ, OSX, OSY) comprises a first amplitude-demodulation oscillator signal (OSX) and a second amplitude-demodulation oscillator signal (OSY) that differ in phase. A first amplitude-demodulation mixer (MIX3) mixes the first amplitude-demodulation oscillator signal (OSX) with the amplitude-modulated signal so as to obtain a first amplitude-demodulated signal (MO3). A second amplitude-demodulation mixer (MIX4) mixes the second amplitude-demodulation oscillator signal (OSY) with the amplitude-modulated signal so as to obtain a second amplitude-demodulated signal (MO4). A magnitude comparator (MDT1, MDT2, DDT) compares respective magnitudes (M+, M?) of the first amplitude-demodulated signal (MO3) and the second amplitude-demodulated signal.

Abstract: A method and apparatus for demodulating different type of signals having at least a portion of overlapping frequency ranges is provided. The method and apparatus receives at least one a broadcast signal and a home networking signal, wherein the frequency range of the broadcast signal overlaps the frequency range of the home networking signal. The system further determines if the received signal is a broadcast signal or a home networking signal and provides the respective signal to a demodulator for demodulation.

Abstract: Embodiments of the invention may be directed to a continuous analog phase shifter for radio frequency (RF) signals, which can be integrated on a CMOS process or another compatible process where inherent process-dependent passive components such as inductors and capacitors may have low quality factors. Insertion loss degradation for a given amount of phase shift may be compensated by using an active compensation circuit/device that smartly controls negative resistance generated from the compensation circuit/device to cancel out finite resistance of a network, leading to very small insertion loss variation. According to an example aspect of the invention, improved phase linearity and increased phase shift for a given size may be obtained by incorporating the compensation circuit/device. Thus, example analog phase shifters in accordance with example embodiments of the invention may have one or more of low insertion loss variation, small size, and good phase linearity over more than a 360 degree phase shift.

Abstract: A demodulation circuit for an Amplitude Shift Keyed (ASK) modulated signal includes an envelope detector, an alternating voltage amplifier, a differentiator circuit, and a comparator having a hysteresis connected in series. The envelope detector produces an envelope signal from the received ASK signal. The amplifier blocks the DC component of the envelope signal and amplifies AC components of the envelope signal to obtain a steeper slope of the rising and falling edges. The differentiator circuit then processes the transition edges to provide a differentiated signal having positive and negative electrical pulses. The comparator converts the pulses into a binary data stream which corresponds to the transmitted data stream. The combination of the differentiated signal and comparator having a hysteresis enables better stability and sensitivity of the ASK demodulation circuit.

Abstract: A directional pattern table memory stores combined directional pattern groups in each of which combined directional patterns are ordered by different predetermined priority according to a different radio propagation environment. A controller computes a communication performance expected value based on RSSIs for when an initial combined directional pattern is set on steerable antenna apparatuses; selects one combined directional pattern group based on relative strengths of RSSIs; and according to the priority, sequentially sets combined directional patterns of the selected one combined directional pattern group, on the steerable antenna apparatuses, computes a communication performance value based on a PHY rate and a PER at each of sequential settings, and performs communication using a combined directional pattern with a communication performance value that first exceeds the communication performance expected value.

Abstract: A method for detecting an end of modulation in a backscattered radio frequency signal according to one embodiment includes generating a fast average of a magnitude or power of an incoming signal; generating a slow average of the magnitude or power of the incoming signal; determining an end of modulation based on a relationship between the fast and slow averages; and outputting an end of modulation signal upon determining the end of modulation. A system for detecting an end of modulation in a backscattered radio frequency signal according to one embodiment includes a window integrator for generating a fast moving average of a magnitude or power of an incoming signal; a leaky integrator for generating a slow moving average of the magnitude or power of the incoming signal; logic for determining an end of modulation when the fast moving average crosses below the slow moving average; and logic for outputting an end of modulation signal. Additional systems and methods are also presented.

Abstract: A signal processing apparatus includes: a digital processing unit to which a digital input signal is supplied, which performs a digital process on the digital input signal to produce a digital signal, and which produces a control signal designating a specific time period when an amplitude of an analog output signal is to be lowered; a DA-conversion unit which converts the digital signal to produce an analog signal; and a variable gain unit which adjusts an amplitude of the analog signal to produce the analog output signal, and which lowers the amplitude of the analog output signal during the specific time period designated by the control signal.

Abstract: A baseband receiver, consisting of a receiver input port, configured to receive a baseband signal generated in response to electrical activity in tissue of a human patient. The receiver includes a modulator, configured to modulate a local oscillator signal with the baseband signal, and an isolating device configured to receive the modulated local oscillator signal at an input port of the device and in response to generate a modulated output local oscillator signal at an output port of the device. The receiver further includes a demodulator configured to demodulate the modulated output local oscillator signal with the local oscillator signal so as to recover the baseband signal.

Abstract: A method includes receiving a first wireless signal and demodulating data in the first wireless signal using a first demodulation technique. The method also includes receiving multiple second wireless signals simultaneously (where the second wireless signals interfere to produce an interfered signal) and demodulating data in the interfered signal using a second demodulation technique. The method could also include (i) determining that a single transmitter transmitted the first wireless signal and selecting the first demodulation technique in response and (ii) determining that multiple transmitters transmitted the second wireless signals and selecting the second demodulation technique in response. Determining that the single transmitter transmitted the first wireless signal could include determining that a fundamental frequency of the first wireless signal is below a threshold.

Abstract: In one illustrative example, a mobile communication device receives and decodes a plurality of packet data bursts over a packet data channel of a serving cell. While receiving and decoding the packet data bursts, the mobile communication device also receives and decodes a plurality of broadcast data bursts over a broadcast control channel of a neighbor cell. When a time conflict exists between receiving and decoding at least one of the packet data bursts and receiving and decoding at least one of the broadcast data bursts, the mobile communication device receives and decodes the at least one packet data burst instead of the at least one broadcast data burst when no imminent call drop between the mobile communication device and the serving cell is identified.

Abstract: The present invention provides a television receiver capable of automatically identifying the kind of a tuner and controlling the tuner in accordance with the kind. In a television receiver having a tuner for receiving a television broadcast signal and a module for detecting an intermediate frequency signal output from the tuner while controlling the tuner and outputting a video signal and an audio signal, the tuner is provided with a circuit for changing predetermined output information which is output from the tuner in accordance with the kind of the tuner, and information indicative of correspondence relation between the predetermined output information and the kind of the tuner is stored in a memory. By collating the predetermined output information output from the tuner with the information stored in the memory at the power on, the kind of the tuner is identified and, according to the kind, the module is allowed to control the tuner.

Abstract: Methods and apparatus are provided for receiving a first signal and generating an output signal indicative of radio data system (“RDS”) information. A receiver circuit of the invention can include mixer circuitry, lowpass filter circuitry, downsampler circuitry, and decoder circuitry. Advantageously, the receiver circuit can operate entirely within the digital domain, promoting interoperability with digital frequency modulation (“FM”) demodulator circuitry.

Abstract: A method for demodulating an RF input signal using an envelope detector and synchronous switching of the input signal before entering and after leaving the envelope detector, the envelope detector having a non-linear transfer function acting essentially as a squaring function. The invention also relates to an electronic receiver circuit performing such a method, and to an RF receiver comprising such an electronic receiver, and to an electronic device comprising such an RF receiver, and to the use of such an RF receiver as a wake-up receiver.

Abstract: An FM audio receiver can include a mono/stereo detector that causes the audio receiver to output either a monophonic or a stereophonic signal based on a received pilot tone energy. An accurate operation of the receiver, including but not limited to correct decoding of monophonic/stereophonic reception, can be based on the receiver operating with the same rated maximum system deviation (RMSD) as the received signal itself. Aspects of the disclosure describe a system and method of detecting and matching a receiver's RMSD to that of a received signal by demodulating a carrier bearing a an input signal over a first bandwidth, extracting a pilot energy signal from the input signal, and demodulating the carrier bearing the input signal over a second bandwidth if the pilot energy signal is within a pilot energy range for a first predetermined amount of time.

Abstract: A system and method for authentication in a wireless mobile communication system are provided, in which a mobile station calculates a CMAC value having a first number of bits, transmits to a base station a ranging request message including a partial CMAC value being a second number of upper bits of the CMAC value having the first number of bits, and receives a ranging response message indicating whether authentication is successful or failed from the base station.

Abstract: A radio apparatus includes an antenna; an amplifier that amplifies a radio signal, received via the antenna; a first mixer that frequency converts the amplified radio signal to generate a first analog signal; a first A/D converter that converts the first analog signal to generate a first digital signal; a second mixer that frequency converts the amplified signal to generate a second analog signal; a second A/D converter means that converts the second analog signal to generate a second digital signal; a demodulator means that demodulates the first and second digital signals to generate a demodulated signal; a detector that detects a preamble from the first digital signal; and a control means that halts the second mixer and second A/D converter during the wait for the radio signal and that activates the second mixer and second A/D converter when the detector detects the preamble.

Abstract: An information processing terminal system includes an information processing terminal; and a transmitting and receiving unit which is attached to the information processing terminal. The transmitting and receiving unit converts a reception wave signal from a network into a reception analog baseband signal. The transmitting and receiving unit converts the reception analog baseband signal into a reception digital baseband signal in synchronization with a clock. The information processing terminal converts the reception digital baseband signal into a reception data in synchronization with a clock, and a transmission data into a transmission digital baseband signal in synchronization with the clock. The transmitting and receiving unit converts the transmission digital baseband signal into a transmission analog baseband signal in synchronization with the clock. The transmitting and receiving unit converts the transmission analog baseband signal into a transmission modulation wave signal to output to the network.

Abstract: An interactive system is provided. The interactive system includes a handheld device and an insertion device. An interactive application program is embedded into the handheld device. The insertion device has a protective case for protecting the handheld device, and the insertion device also has a slave circuit, where the insertion device does not have a screen or a keypad. When the interactive application program is activated by a user through putting the handheld device into the insertion device, the handheld device will display an interactive graphical user interface so as to guide the user to set the insertion device, and the handheld device controls the functions of the slave circuit.

Abstract: A semiconductor device is provided, which comprises a first demodulation circuit, a second demodulation circuit, a first bias circuit, a second bias circuit, a comparator, an analog buffer circuit, and a pulse detection circuit. An input portion of the pulse detection circuit is electrically connected to an output portion of the analog buffer circuit, a first output portion of the pulse detection circuit is electrically connected to an input portion of the first bias circuit, and a second output portion of the pulse detection circuit is electrically connected to an input portion of the second bias circuit.

Abstract: According to one aspect of the present invention, a controller is coupled to at least first and second signal processors (at least one of which includes analog demodulation circuitry and another of which includes digital demodulation circuitry). The controller may operate to disable the first signal processor responsive to a control signal that indicates that a second signal (corresponding to a demodulator output) is available from the second signal processor.

Abstract: A plurality of phases of sniff operations are performed for detecting wake-up signals being received by an implantable medical device (IMD), including a phase that performs a staged detection of whether the integrated frequency deviation of a received signal is outside of an expected frequency deviation range, where sniff operations are aborted if the integrated frequency deviation of the received signal falls outside of corresponding high and low thresholds in any stage, wherein the difference between the high and low thresholds tightens with each subsequent stage and an average frequency deviation over all completed stages are used in the calculations. One phase of sniff operations includes a dual frequency modulation (FM) detector including a first FM detector that introduces a small delay in a received signal providing an average frequency estimate and a second FM detector having a larger delay that is adjusted based on the estimated average frequency.

Abstract: A wireless communication medium includes an antenna, an analog signal processor, a digital signal processor, and a central processing unit & logic module. The antenna transmits and receives a signal to and from an external apparatus. The analog signal processor converts an analog signal to a digital signal, and converts a digital signal to an analog signal. The digital signal processor demodulates the digital signal, detects the start and end of data, and generates a first control signal for determining whether data is transmitted to the external apparatus and a second control signal for perceiving the end of data, blocking the reception of data, modulating data, and determining whether modulated data is transmitted to the external apparatus. The central processing unit & logic module processes data received from and transmitted to the external apparatus. Accordingly, an efficiency of processing a RF signal can be improved.