Abstract: A communication device includes a crystal oscillator, an auxiliary circuit, and a control circuit. The crystal oscillator provides a clock for operation of the communication device in a second mode. The auxiliary circuit includes an accumulator and a comparator. The accumulator counts a number according to an MDI (Medium Dependent Interface) signal. The comparator compares the number with a threshold. If the number is greater than or equal to the threshold, the comparator will output a wakeup signal. The control circuit switches from the second mode to a first mode in response to a control signal, and switches from the first mode to the second mode in response to the wakeup signal. In the first mode, the control circuit disables the crystal oscillator and enables the auxiliary circuit. In the second mode, the control circuit enables the crystal oscillator.

Abstract: The invention relates to a method, a non-transitory computer-readable storage medium, and an apparatus for receiving Bluetooth packets and correcting error bits therein. The method, which is performed by a processing unit, includes: receiving Bluetooth packets from radio frequency (RF) signal; verifying a unique synthesized packet with a checksum thereof when the unique synthesized packet can be generated from the Bluetooth packets; and transmitting a synthesized packet that has passed a verification to a program module for an application when the unique synthesized packet passes the verification.

Abstract: A controller circuit of a switching regulator includes a constant on-time (COT) setting circuit and a decision circuit. The COT setting circuit adjusts a COT control setting adaptively, wherein an on-time of a high-side power switch of the switching regulator depends on the COT control setting. The decision circuit enables a control scheme of periodically triggering a regulation operation of an output voltage of the switching regulator during a period in which the COT control setting is assigned a minimum COT control value allowed by the switching regulator, wherein during the period, a turn-off time of a low-side power switch of the switching regulator depends on a comparison between a feedback voltage and a first reference voltage, where the feedback voltage is derived from the output voltage.

Abstract: A controller circuit of a switching regulator includes a constant on-time (COT) setting circuit and a delay time setting circuit. The COT setting circuit adjusts a COT control setting adaptively, wherein an on-time of a high-side power switch of the switching regulator depends on the COT control setting. The delay time setting circuit adjusts a delay time control setting adaptively during a period in which the COT control setting is assigned a minimum COT control value allowed by the switching regulator, wherein a delay time applied to a turn-off time of a low-side power switch of the switching regulator depends on the delay time control setting.

Abstract: A channel sounding method is used for performing distance estimation based on phase-based ranging, and includes: generating a first single-tone signal with at least one security marker embedded therein for a first tone duration; and during the first tone duration, transmitting the first single-tone signal from a first wireless communication device to a second wireless communication device.

Abstract: A single-inductor multi-output (SIMO) switching regulator includes an inductor, switch circuits, and a controller circuit. A first switch circuit is coupled between an input voltage node and a first end of the inductor. A second switch circuit is coupled between a reference voltage node and the first end of the inductor. A third switch circuit is coupled between a first output voltage node and a second end of the inductor. A fourth switch circuit is coupled between a second output voltage node and the second end of the inductor. During a first period, the first switch circuit is off, and the second switch circuit is switched on. During a first phase within the first period, the third switch circuit is on, and the fourth switch circuit is off. During a second phase within the first period, the fourth switch circuit is on, and the third switch circuit is off.

Abstract: A method for managing a plurality of data flows associated with a network processing component in a data transmission system includes providing a plurality of traffic control units, each associated with a respective data flow of the plurality of data flows; dynamically adjusting a committed information rate (CIR) for the plurality of traffic control units; and controlling data rates of the plurality of data flows using the plurality of traffic control units with the adjusted CIR.

Abstract: A calibration circuit of a pulse-frequency modulation (PFM) converter includes a signal generator circuit and a calibration control circuit. The signal generator circuit generates and outputs an emulated slope signal to a comparator circuit under a calibration mode, wherein the emulated slope signal has an emulated slope following an initial voltage, and the emulated slope corresponds to a slope of a sensed signal indicative of electrical characteristic of an inductor of the PFM converter. The calibration control circuit refers to an output signal that is generated from a PFM control circuit in response to an output signal of the comparator circuit, to calibrate at least one circuit of the PFM converter.

Abstract: An audio processing circuit includes at least one audio filter, at least one adaptive non-active noise control (non-ANC) filter, and a leakage detection circuit. The at least one audio filter controls an output signal for an audio function. The at least one adaptive non-ANC filter generates at least one non-anti-noise signal according to an audio playback signal. The leakage detection circuit performs leakage detection according to a first input signal and a second input signal, and adjusts the at least one adaptive non-ANC filter according to a leakage detection result, wherein the first input signal is indicative of noise signal signature, and the second input signal is derived from an error signal output by an error microphone that picks up remnant noise resulting from the audio function.

Abstract: A Bluetooth (BT) communication system includes a first BT device and a second BT device. The first BT device generates and transmits a first packet segment. The second BT device generates and transmits a second packet segment. The first packet segment and the second packet segment belong to a single BT packet.

Abstract: A signal quality measurement apparatus includes a processing circuit and a signal quality measurement circuit. The processing circuit receives a reference signal from a first circuit and a signal under test from a second circuit, and refers to the reference signal to derive a signal after processing from the signal under test, wherein the signal under test is derived from predetermined signal processing of the reference signal. The signal quality measurement circuit calculates a signal quality value according to the reference signal and the signal after processing.

Abstract: A source follower circuit includes a first MOS transistor, a second MOS transistor, a third MOS transistor, and a feedback loop circuit. Regarding the first MOS transistor, a gate terminal receives an input signal of the source follower circuit, and a source terminal outputs an output signal of the source follower circuit. Regarding the second MOS transistor, a gate terminal is coupled to a bias voltage, a source terminal is coupled to a first reference voltage, and a drain terminal is coupled to the source terminal of the first MOS transistor. Regarding the third MOS transistor, it is a self-biased diode-connected MOS transistor with its gate terminal coupled to its drain terminal. The drain terminal of the third MOS transistor is coupled to a drain terminal of the first MOS transistor, and a source terminal of the third MOS transistor is coupled to a second reference voltage.

Abstract: A sequence detection device includes a feed-forward filter, a feedback filter, a combining circuit, a decision circuit, and a sequence detection circuit. The feed-forward filter processes a received signal to generate a first equalized signal. The feedback filter processes a symbol decision signal to generate a second equalized signal. The combining circuit combines the first and second equalized signals to generate a sample signal. The decision circuit performs hard decision upon the sample signal to generate the symbol decision signal. The sequence detection circuit performs sequence detection upon the first equalized signal, and includes a region estimation circuit and a trellis selection circuit. The region estimation circuit is independent of the decision circuit, and categorizes each sample of the sample signal into one region. The trellis selection circuit selects one trellis scheme for branch metric calculation according to region estimation results output from the region estimation circuit.

Abstract: A semiconductor package includes a printed circuit board (PCB), a semiconductor device, a first signal bonding wire, and a first ground bonding wire. The PCB includes a first PCB ground pad and a first PCB signal trace. The semiconductor device includes a first device ground pad and a first device signal pad. The first signal bonding wire is coupled between the first device signal pad and the first PCB signal trace. The first ground bonding wire is coupled between the first device ground pad and the first PCB ground pad, wherein the first ground bonding wire crosses over the first signal bonding wire.

Abstract: An audio processing circuit is used for generating an output signal for an audio function, and includes at least one adaptive filter and a leakage detection circuit. The at least one adaptive filter controls the output signal. The leakage detection circuit performs leakage detection according to a first input signal and a second input signal, and adjusts the at least one adaptive filter according to a leakage detection result. The first input signal is indicative of noise signal signature. The second input signal is derived from an error signal output by an error microphone that picks up remnant noise resulting from the audio function.

Abstract: A sampling system includes a sampler circuit, a first settling error canceller circuit, and a second settling error canceller circuit. During a first phase, each of the sampler circuit and the first settling error canceller circuit perform a sampling operation, and the second settling error canceller circuit performs a holding operation. During a second phase, the sampler circuit and the second settling error canceller circuit perform charge redistribution, and the first settling error canceller circuit performs a holding operation. During a third phase, each of the sampler circuit and the second settling error canceller circuit performs a sampling operation, and the first settling error canceller circuit performs a holding operation. During a fourth phase, the sampler circuit and the first settling error canceller circuit perform charge redistribution, and the second settling error canceller circuit performs a holding operation.

Abstract: A semiconductor package structure includes a functional die, a heat dissipation component, an adhesive, a molding compound, and a thermally conductive material. A bottom surface of the heat dissipation component is bonded to a top surface of the functional die via the adhesive. The functional die and the heat dissipation component are encapsulated by the molding compound. The thermally conductive material has a physical contact with a top surface of the heat dissipation component, wherein thermal conductivity of the heat dissipation component is higher than thermal conductivity of the modeling compound, and thermal conductivity of the thermally conductive material is higher than the thermal conductivity of the heat dissipation component.

Abstract: A sequence detection device includes a feed-forward filter and a sequence detection circuit. The feed-forward filter processes a received signal to generate an equalized signal. The sequence detection circuit performs sequence detection upon the equalized signal to generate and output a symbol sequence. The sequence detection circuit includes a region estimation circuit and a trellis selection circuit. The region estimation circuit categorizes each of samples included in the equalized signal into one of regions. The trellis selection circuit selects one of trellis schemes for branch metric calculation according to region estimation results of two of the samples output from the region estimation circuit.

Abstract: A sequence detection device includes a feed-forward filter and a sequence detection circuit. The feed-forward filter processes a received signal to generate an equalized signal. The sequence detection circuit performs sequence detection upon the equalized signal to generate and output a symbol sequence. The sequence detection circuit includes a region estimation circuit and a trellis selection circuit. The region estimation circuit categorizes each of samples included in the equalized signal into one of regions. The trellis selection circuit selects one of trellis schemes for branch metric calculation according to region estimation results of two of the samples output from the region estimation circuit.

Abstract: A sequence detection device includes a feed-forward filter, a feedback filter, a combining circuit, a decision circuit, and a sequence detection circuit. The feed-forward filter processes a received signal to generate a first equalized signal. The feedback filter processes a symbol decision signal to generate a second equalized signal. The combining circuit combines the first and second equalized signals to generate a sample signal. The decision circuit performs hard decision upon the sample signal to generate the symbol decision signal. The sequence detection circuit performs sequence detection upon the first equalized signal, and includes a region estimation circuit and a trellis selection circuit. The region estimation circuit is independent of the decision circuit, and categorizes each sample of the sample signal into one region. The trellis selection circuit selects one trellis scheme for branch metric calculation according to region estimation results output from the region estimation circuit.