A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.

A two-point phase modulator comprising a phase locked loop, PLL, having a voltage controlled oscillator, VCO, and a feedback path, a first modulation circuit for introducing a first modulation signal into the feedback path, the first modulation circuit generating the first modulation signal using a reference clock signal extracted from the PLL and derived from a first clock, a second modulation circuit for introducing a second modulation input into the VCO, the second modulation circuit generating the second modulation signal using a clock signal generated independently of the reference clock and a synchronizer for aligning the second modulation signal in time with the first clock signal.

A two-point phase modulator comprising a phase locked loop, PLL, having a voltage controlled oscillator, VCO, and a feedback path, a first modulation circuit for introducing a first modulation signal into the feedback path, the first modulation circuit generating the first modulation signal using a reference clock signal extracted from the PLL and derived from a first clock, a second modulation circuit for introducing a second modulation input into the VCO, the second modulation circuit generating the second modulation signal using a clock signal generated independently of the reference clock and a synchronizer for aligning the second modulation signal in time with the first clock signal.

A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.

This disclosure relates to an apparatus, system, and method for generating uplink transmissions using a polar architecture including a phase locked loop with potential for two point injection. According to some embodiments, frequency resources allocated for a transmission may be determined. A cartesian baseband signal may be generated for the uplink transmission. The cartesian baseband signal may be converted to a polar baseband signal, including a baseband phase signal and an amplitude signal. Modulation parameters, potentially including whether to use one point injection or two point injection with a phase locked loop, may be determined. The baseband phase signal may be upconverted to an RF phase signal according to the determined modulation parameters. The RF phase signal may be amplified according to the amplitude signal to produce an RF signal. The RF signal may be transmitted.

A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.

An audio FM transmitter is disclosed that may achieve high-precision frequency control as well as compact size and low cost by enabling FM modulation using a fractional-N type PLL circuit.