Abstract: A method of envelope detection operates by receiving a RF (radio frequency) signal having a first voltage at a first node and a second voltage at a second node; using a common-mode source-follower (CMSF) having a first source follower and a second source follower connected in parallel and configured to receive the first voltage and the second voltage, respectively, and jointly output a first current to a third node in accordance with a sum of a second current and a third current received via a fourth node; establishing a first negative feedback control loop by converting the first current into the third current using a current-controlled current source (CCCS); and establishing a second negative feedback control loop by converting a drain voltage at the third node into the second current using a voltage-controlled current source (VCCS).

Abstract: A self-loopback radio transmitter having a transmitter with a modulator configured to up-convert a first baseband signal into a first RF (radio frequency) signal in accordance with a first LO (local oscillator) signal, and a power amplifier configured to receive the first RF signal and output a second RF signal to be emitted by an antenna and a third RF signal to be looped back, wherein the third RF signal is magnetically coupled from the second RF signal; and a loopback network having a shielded serial inductor configured to receive the third RF signal and output a fourth RF signal, and a demodulator configured to down-convert the fourth RF signal into a second baseband signal in accordance with a second LO signal, wherein the shielded serial inductor has a serial inductor of spiral topology and a coil laid out on a lower metal layer.

Abstract: An interface of integrated circuit (IC) die includes a plurality of the contact elements formed as a contact element pattern corresponding to a parallel bus. The contact elements are arranged in an array of rows and columns and divided into a transmitting group and a receiving group. The contact elements of the transmitting group have a first contact element sequence and the contact elements of the receiving group have a second contact element sequence, the first contact element sequence is identical to the second contact element sequence. The contact elements with the first contact element sequence and the second contact element sequence are matched when the contact element pattern is geometrically rotated by 180° with respect to a row direction and a column direction.

Abstract: A multi-level signal transmitter includes an encoder figured to receive an input data and output a plurality of logical signal sets, each of said plurality of logical signal sets comprising a plurality of logical signals; and a plurality of tree-structured drivers configured to receive said plurality of logical signal sets, respectively, and jointly establish an output voltage at an output node, wherein each of said tree-structure drivers comprises a plurality of inverters configured to receive said plurality of logical signals of its respective logical signal set and jointly establish a joint voltage at a bifurcation node via coupling to the bifurcation node through a plurality of first-level weighting resistors, and a second-level weighting resistor configured to couple the bifurcation node to the output node.

Abstract: A multi-stage amplifier includes a first stage comprising a first common-source amplifier, a first inductive load network comprising a serial connection of a first load resistor and a first load inductor, and a first source network configured to receive a first signal and output a first load signal, and a first inter-stage inductor configured to couple the first load signal to a second signal; and a second stage comprising a second common-source amplifier, a second inductive load network comprising a serial connection of a second load resistor and a second load inductor, and a second source network configured to receive the second signal and output a second load signal, and a second inter-stage inductor configured to couple the second load signal to a third signal, wherein the first load inductor and the second load inductor are laid out to enhance an inter-stage inductive coupling.

Abstract: A multi-stage amplifier includes a first stage comprising a first common-source amplifier, a first inductive load network comprising a serial connection of a first load resistor and a first load inductor, and a first source network configured to receive a first signal and output a first load signal, and a first inter-stage inductor configured to couple the first load signal to a second signal; and a second stage comprising a second common-source amplifier, a second inductive load network comprising a serial connection of a second load resistor and a second load inductor, and a second source network configured to receive the second signal and output a second load signal, and a second inter-stage inductor configured to couple the second load signal to a third signal, wherein the first load inductor and the second load inductor are laid out to enhance an inter-stage inductive coupling.

Abstract: A multi-level signal transmitter includes an encoder figured to receive an input data and output a plurality of logical signal sets, each of said plurality of logical signal sets comprising a plurality of logical signals; and a plurality of tree-structured drivers configured to receive said plurality of logical signal sets, respectively, and jointly establish an output voltage at an output node, wherein each of said tree-structure drivers comprises a plurality of inverters configured to receive said plurality of logical signals of its respective logical signal set and jointly establish a joint voltage at a bifurcation node via coupling to the bifurcation node through a plurality of first-level weighting resistors, and a second-level weighting resistor configured to couple the bifurcation node to the output node.

Abstract: A continuous-time linear equalizer (CTLE) having a common-source amplifier configured to receive an input signal and output an output signal in accordance with a biasing current; a current source controlled by a first bias voltage and configured to output the biasing current; an active load controlled by a second bias voltage and configured to be a load of the common-source amplifier; a common-mode sensing circuit configured to sense a common-mode voltage of the output signal; a current source controller configured to output the first bias voltage in accordance with the common-mode voltage and a reference voltage derived from a supply voltage of the active load and a first reference current; and an active load controller configured to output the second bias voltage in accordance with the supply voltage of the active load and a second reference current.

Abstract: An interface of integrated circuit (IC) die includes a plurality of the contact elements formed as a contact element pattern corresponding to a parallel bus. The contact elements are arranged in an array of rows and columns and divided into a transmitting group and a receiving group. The contact elements of the transmitting group have a first contact element sequence and the contact elements of the receiving group have a second contact element sequence, the first contact element sequence is identical to the second contact element sequence. The contact elements with the first contact element sequence and the second contact element sequence are matched when the contact element pattern is geometrically rotated by 180° with respect to a row direction and a column direction.

Abstract: A circuit of communication interface between dies is provided. The circuit includes a first interface of the first die having a serializer to serialize an input data of N bits a serialized data for transmitting out and a second interface of the second die having a de-serializer to receive and deserialize the serialized data into a de-serialized data. In addition, an interconnection structure connected between the first die and the second die to connect the serializer and the de-serializer, wherein the interconnection structure is an interposer or a redistribution layer of a semiconductor structure to form a parallel bus for transmitting the serialized data in one line of the parallel bus between the first die and the second die. A clock generator provides a first clock to a first ripple counter of the serializer and a second clock to a second ripple counter of the de-serializer.

Abstract: A clock data recovery device includes a phase detector circuitry, a signal control circuitry, and interpolators. The phase detector is configured to detect a phase of an input signal, according to first clock signals, to generate first control signals, and phases of the first clock signals are different to each other. The signal control circuitry is configured to rearrange the first control signals to output as second control signals. The phase interpolators are configured to output second clock signals and alternatively adjust the phases of the second clock signals according to the second control signals to generate an output clock signal.

Abstract: An amplifier device includes an amplifier circuitry, a controller circuitry, and an offset cancellation circuitry. The amplifier circuitry is configured to amplify a first input signal and a second input signal, in order to generate a first output signal and a second output signal. The controller circuitry is configured to generate a first control signal and a second control signal according to the first output signal and the second output signal. The offset cancellation circuitry is configured to provide a negative capacitor to the amplifier circuitry, and to adjust at least one current flowing through a circuit, which provides the negative capacitor, of the offset cancellation circuitry according to the first control signal and the second control signal, in order to cancel an offset of the amplifier circuitry.

Abstract: A voltage mode signal transceiving device and a voltage mode signal transmitter thereof are provided. The voltage mode signal transmitter includes a driver, an output resistor, and a compensation capacitor. The driver provides a transmitting signal to an output end, where the output end is coupled to a receiver. The output resistor is connected in series to a coupling path between the driver and the receiver. The compensation capacitor and the output resistor are coupled in parallel. A capacitance value of the compensation capacitor is essentially equal to a capacitance value of an equivalent capacitor on an input end of the receiver.

Abstract: An amplifier device includes an amplifier circuitry, a controller circuitry, and an offset cancellation circuitry. The amplifier circuitry is configured to amplify a first input signal and a second input signal, in order to generate a first output signal and a second output signal. The controller circuitry is configured to generate a first control signal and a second control signal according to the first output signal and the second output signal. The offset cancellation circuitry is configured to provide a negative capacitor to the amplifier circuitry, and to adjust at least one current flowing through a circuit, which provides the negative capacitor, of the offset cancellation circuitry according to the first control signal and the second control signal, in order to cancel an offset of the amplifier circuitry.

Abstract: A clock data recovery device includes a phase detector circuitry, a signal control circuitry, and interpolators. The phase detector is configured to detect a phase of an input signal, according to first clock signals, to generate first control signals, and phases of the first clock signals are different to each other. The signal control circuitry is configured to rearrange the first control signals to output as second control signals. The phase interpolators are configured to output second clock signals and alternatively adjust the phases of the second clock signals according to the second control signals to generate an output clock signal.

Abstract: A voltage mode signal transmitter includes a front-end signal processor and a signal transformer. The front-end signal processor receives a first and second data signal, and delays and inverts the data signals to generate a third and fourth data signal. The front-end signal processor selects two of the first data signal to the fourth data signal to generate a plurality of signal pairs according to a first control signal. The signal transformer selects one data signal of each of the signal pairs to generate input voltages according to a second control signal, and generates an output voltage according to the input voltages. A working frequency of the first control signal is lower than a working frequency of the second control signal.

Abstract: A device for generating a duty cycle includes a converter, a corrector, and a control circuit. The converter is configured to generate a first output signal having a duty cycle to an output terminal according to an input signal. The corrector is coupled to the output terminal, and is configured to adjust the duty cycle of the first output signal according to a control signal. The converter is coupled in parallel with the corrector and between a first power source and a second power source. The control circuit is coupled to the output terminal, and is configured to generate the control signal according to the first output signal and a reference signal.

Abstract: A device for generating a duty cycle includes a converter, a corrector, and a control circuit. The converter is configured to generate a first output signal having a duty cycle to an output terminal according to an input signal. The corrector is coupled to the output terminal, and is configured to adjust the duty cycle of the first output signal according to a control signal. The converter is coupled in parallel with the corrector and between a first power source and a second power source. The control circuit is coupled to the output terminal, and is configured to generate the control signal according to the first output signal and a reference signal.

Abstract: An integrated circuit, a multi-channel transmission apparatus, and a signal transmission method thereof are provided. The multi-channel transmission apparatus includes a pre-stage circuit, a clock signal generator, and a post-stage circuit. The pre-stage circuit receives a plurality of first clock signals and a plurality of data signals, selects one of the first clock signals to be a base clock signal, and transmits the data signals according to the base clock signal to respectively generate a plurality of middle signals. The clock signal generator generates the first clock signals according to a second clock signal, wherein a frequency of the second clock signal is higher than a frequency of the first clock signals. The post-stage circuit transmits the middle signals according to the second clock signal to respectively generate a plurality of output signals. The pre-stage circuit is a digital circuit, and the post-stage circuit is an analog circuit.

Abstract: A measurement system of a data transmission interface includes a signal generator and a signal receiver. The signal generator transmits an input data to the data transmission interface. The signal receiver receives an output data from the data transmission interface. The signal receiver measures a jitter tolerance capability of the data transmission interface according to error feedback data of the output data. The data transmission interface includes a receiving circuit, a synchronous circuit, and a transmitting circuit. The receiving circuit receives the input data and generates an error signal when a data error occurs. The synchronous circuit receives the error signal to generate an error indication signal. The transmitting circuit transmits the output data to the signal receiver and receives the error indication signal when the data error occurs, in order to generate the error feedback data in the output data according to the error indication signal.