Abstract: A frequency-selective circuit includes a signal input port, a signal output port, and a frequency response control block. The frequency response control block includes a mixer module and a filter module. The mixer module has a first port electrically connected to a signal path between the signal input port and the signal output port, a second port electrically connected to the filter module, and a local oscillator (LO) port. The mixer module operates according to an LO input received by the LO port. The filter module is electrically connected to the second port of the mixer module.

Abstract: A power combiner includes a primary winding and a secondary winding, wherein at least the primary winding comprises a center-tap; and a termination module operably coupled to the center-tapped primary winding and arranged to provide harmonic terminations on a plurality of frequencies. In addition, there is provided a radio frequency transmitter having a power combiner, where the power combiner includes a primary winding and a secondary winding, wherein at least the primary winding includes a center-tap; and a termination module operably coupled to the center-tapped primary winding and arranged to provide harmonic terminations on a plurality of frequencies.

Abstract: A receiver front end circuit includes a low-noise amplifier including: a first receiver path having: a first low-noise transconductor to amplify a received signal and output the amplified received signal; and a first mixer to down-convert the amplified received signal. A second receiver path includes: an auxiliary receiver having: a second transconductor to output an amplified received signal; a baseband amplifier having an input port and an output port; a first resistance coupling the input port to the output port of the baseband amplifier and to convert the amplified received signal from current to voltage and set a voltage gain of the second receiver path; and a second resistance coupled from the output port of the baseband amplifier to the first mixer output. In some examples, frequency-upconversion feedback path includes a third mixer to frequency up-convert the amplified received signal at an output of the second receiver path.

Abstract: A radio frequency transmitter includes: power amplifier stages having paired output terminals, where a pair of output terminals is coupled to a respective amplifier stage. A power combining arrangement includes: first paired input terminals, second input terminals, such that each input of the first paired input terminals is coupled to the same second input terminal; and a power transfer circuit coupling the second input terminals. A first pair of cross coupled bond wires couples a pair of amplifier stage output terminals with a different second input terminal via terminals of different pairs of the first paired input terminals; and a second pair of cross coupled bond wires overlays the first pair of cross coupled bond wires and couples a further pair of amplifier stage output terminals with a different second input terminal via terminals of different pairs of the first paired input terminals.

Abstract: A power combiner includes a primary winding and a secondary winding, wherein at least the primary winding comprises a centre-tap; and a termination module operably coupled to the centre-tapped primary winding and arranged to provide harmonic terminations on a plurality of frequencies. In addition, there is provided a radio frequency transmitter having a power combiner, where the power combiner includes a primary winding and a secondary winding, wherein at least the primary winding includes a centre-tap; and a termination module operably coupled to the centre-tapped primary winding and arranged to provide harmonic terminations on a plurality of frequencies.

Abstract: A receiver front end circuit includes a low-noise amplifier including: a first receiver path having: a first low-noise transconductor to amplify a received signal and output the amplified received signal; and a first mixer to down-convert the amplified received signal. A second receiver path includes: an auxiliary receiver having: a second transconductor to output an amplified received signal; a baseband amplifier having an input port and an output port; a first resistance coupling the input port to the output port of the baseband amplifier and to convert the amplified received signal from current to voltage and set a voltage gain of the second receiver path; and a second resistance coupled from the output port of the baseband amplifier to the first mixer output. In some examples, frequency-upconversion feedback path includes a third mixer to frequency up-convert the amplified received signal at an output of the second receiver path.

Abstract: A power combiner includes a planar figure-8 shaped primary winding and a planar figure-8 shaped secondary winding; wherein, the planar figure-8 shaped primary winding is substantially overlaid with the planar figure-8 shaped secondary winding. In addition, there is provided a radio frequency (RF) transmitter having a power combiner, where the power combiner includes a planar figure-8 shaped primary winding and a planar figure-8 shaped secondary winding, wherein the planar figure-8 shaped primary winding is substantially overlaid with the planar figure-8 shaped secondary winding.

Abstract: A diplexer, for coupling a first radio frequency (RF) signal corresponding to a first carrier frequency and a second RF signal corresponding to a second carrier frequency is disclosed. The diplexer includes a first port arranged to couple the first RF signal; a second port arranged to couple the second RF signal; a third port capable of connecting an antenna; a first impedance unit coupled to the first port and the third port; and a second impedance unit coupled to the second port and the third port; wherein the first port, the second port and the third port are coupled to a direct current (DC) ground; wherein the first impedance unit is arranged to provide an first open-circuit impedance against the second RF signal, and the second impedance unit is arranged to provide a second open-circuit impedance against the first RF signal.

Abstract: A method for controlling an electrical property of a passive device during a fabrication of an integrated component includes providing a substrate, manufacturing the passive device on the substrate, measuring the electrical property of the passive device to obtain a measuring result, determining at least one layout pattern corresponding to at least one later manufacturing process by the measuring result for adjusting the electrical property of the passive device, and continuing the rest of the fabrication including the at least one later manufacturing process of the integrated component.

Abstract: A phased-array receiver that may be effectively implemented on a silicon substrate. A receiver includes multiple radio frequency (RF) front-ends, each configured to receive a signal with a given delay relative to the others such that the gain of the received signal is highest in a given direction. The receiver also includes a power combination network configured to accept an RF signal from each of the RF front-ends and to pass a combined RF signal to a down-conversion element, where the power distribution network includes a combination of active and passive components. Each RF front-end includes a phase shifter configured to delay the signal in accordance with the given direction and a variable amplifier configured to adjust the gain of the signal.

Abstract: A low noise amplifier is used to amplify a differential input pair to generate a differential output pair. The low noise amplifier includes two main paths, two assistant circuits and two adders to make noise carried on two output signals of the differential output pair be the same; therefore, the noise of the two output signals can be fully cancelled in the following operations.

Abstract: A method for controlling an electrical property of a passive device during a fabrication of an integrated component includes providing a substrate, manufacturing the passive device on the substrate, measuring the electrical property of the passive device to obtain a measuring result, determining at least one layout pattern corresponding to at least one later manufacturing process by the measuring result for adjusting the electrical property of the passive device, and continuing the rest of the fabrication including the at least one later manufacturing process of the integrated component.

Abstract: A low noise amplifier is used to amplify a differential input pair to generate a differential output pair. The low noise amplifier includes two main paths, two assistant circuits and two adders to make noise carried on two output signals of the differential output pair be the same; therefore, the noise of the two output signals can be fully cancelled in the following operations.

Abstract: A frequency divider includes a plurality of logic circuit blocks. Each of the logic circuit blocks has a plurality of control terminals. At least one of the control terminals of one of the logic circuit blocks is arranged to receive an input clock signal having a first duty cycle. At least one of the remaining control terminals of the one of the logic circuit blocks is arranged to couple another one of the logic circuit blocks by a positive feedback. A clock signal at the at least one of the remaining control terminals has a second duty cycle different from the first duty cycle. Each of the logic circuit blocks includes a plurality of first transistors coupled in parallel between a first reference voltage and an output terminal, and a plurality of second transistors coupled in series between a second reference voltage and the output terminal.

Abstract: A push-pull low noise amplifier (LNA) includes at least one amplifier block. Each amplifier block includes a bypass stage and at least one gain cell. The bypass stage has a first node and a second node. The gain cell has an input terminal and an output terminal, comprising a loading stage and a driving stage. When the push-pull LNA is in a first gain mode, the loading stage is enabled and the bypassing stage is disabled; and when the push-pull LNA is in a second gain mode, the loading stage is disabled and the bypassing stage is enabled.

Abstract: A method of setting filtering characteristic of a signal processing apparatus includes following steps: configuring a first signal processing path, included in the signal processing apparatus and electrically connected to a signal input port of the signal processing apparatus, to have a first filtering characteristic; and configuring a second signal processing path, included in the signal processing apparatus and electrically connected between the signal input port and the first signal processing path, to have a second filtering characteristic different from the first filtering characteristic. When an input signal received at the signal input port includes a first signal component with a first frequency and a second signal component with a second frequency, most of the first signal component is processed by the first signal processing path, and most of the second signal component is processed by the second signal processing path.

Abstract: A frequency divider includes a plurality of logic circuit blocks. Each of the logic circuit blocks has a plurality of control terminals. At least one of the control terminals of one of the logic circuit blocks is arranged to receive an input clock signal having a first duty cycle. At least one of the remaining control terminals of the one of the logic circuit blocks is arranged to couple another one of the logic circuit blocks by a positive feedback. A clock signal at the at least one of the remaining control terminals has a second duty cycle different from the first duty cycle.

Abstract: A reflection-type phase shifter is provided. The reflection-type phase shifter has a coupler, a first reflection load, and a second reflection load. The coupler has an input port for receiving an input signal and an isolated port for outputting an output signal due to a first reflected signal at a through port and a second reflected signal at a coupled port. The first reflection load reflects the first fraction of the input signal to thereby generate the first reflected signal. The second reflection load reflects the second fraction of the input signal to thereby generate the second reflected signal. In addition, at least one of the first and second reflection loads is a transmission line.

Abstract: A push-pull low noise amplifier (LNA) includes at least one amplifier block. Each amplifier block includes a bypass stage and at least one gain cell. The bypass stage has a first node and a second node. The gain cell has an input terminal and an output terminal, comprising a loading stage and a driving stage. When the push-pull LNA is in a first gain mode, the loading stage is enabled and the bypassing stage is disabled; and when the push-pull LNA is in a second gain mode, the loading stage is disabled and the bypassing stage is enabled.

Abstract: A phase shifter and related load device are provided. The phase shifter includes a phase shifter core and load devices. The phase shifter core has an input port for receiving an input signal, an output port for outputting an output signal, and connection ports. The load devices are coupled to the connection ports, respectively. At least one of the load devices includes first varactor units each having a first node and a second node, where first nodes of the first varactor units are coupled to a first voltage, second nodes of the first varactor units are respectively coupled to a plurality of second voltages, and the second voltages include at least two voltages different from each other. The phase shifter and related load device are capable of mitigating effects resulted from varactor's non-linear C-V curve.