APPARATUS, SYSTEM AND METHOD OF PHASE SHIFTING

    公开(公告)号:US20240113696A1

    公开(公告)日:2024-04-04

    申请号:US17958340

    申请日:2022-10-01

    CPC classification number: H03H11/16 G06F1/08 H04L27/2067

    Abstract: For example, a phase shifter may include an input to receive an input clock signal having an input frequency and an input phase. For example, the phase shifter may include a quadrature phase-shift generator configured to generate a first signal and a second signal based on the input clock signal, the first and second signals having the input frequency, wherein a phase of the first signal is based on the input phase, wherein a phase of the second signal is shifted by a quadrature phase-shift relative to the phase of the first signal. For example, the phase shifter may include an output to provide an output based on the first signal and the second signal.

    Transmitter and method for generating radio frequency transmit signal, mobile device and base station

    公开(公告)号:US11949441B2

    公开(公告)日:2024-04-02

    申请号:US16936456

    申请日:2020-07-23

    CPC classification number: H04B1/0475 H04B7/10 H04B2001/0491

    Abstract: A transmitter for generating a radio frequency, RF, transmit signal is provided. The transmitter includes signal generation circuitry configured to generate, based on a sequence of first control words each indicating a respective frequency shift with respect to a target frequency of the RF transmit signal, a RF carrier signal with sequentially varying frequency over time in order to frequency spread the RF transmit signal. Further, the transmitter includes modulation circuitry configured to generate the RF transmit signal by modulating the RF carrier signal with a modulation control signal. The transmitter additionally includes modification circuitry configured to generate the modulation control signal by modifying, based on the sequence of first control words, phase information of a baseband signal bearing information to be transmitted or phase information of a signal derived from the baseband signal in order to frequency de-spread the RF transmit signal.

    Voltage-controlled oscillator with reduced single-ended capacitance

    公开(公告)号:US09473068B2

    公开(公告)日:2016-10-18

    申请号:US14754108

    申请日:2015-06-29

    Abstract: Embodiments provide a voltage controlled oscillator (VCO) having reduced single-ended capacitance. In one embodiment, the VCO may include a transformer, a capacitor bank, and a gain stage. The transformer may include a primary inductor and a secondary inductor, and the secondary inductor may be inductively coupled to the primary inductor. The capacitor bank may be coupled to the secondary inductor and may provide a majority of a total capacitance of the VCO. The gain stage may be coupled to the primary inductor and configured to receive a supply signal and to drive a differential current in the primary inductor, thereby inducing an output signal across the secondary inductor having a frequency equal to a resonant frequency of the VCO.

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