公开(公告)号：US20240243698A1

公开(公告)日：2024-07-18

申请号：US18409527

申请日：2024-01-10

Applicant: STMicroelectronics International N.V.

Inventor： Nunzio SPINA ,  Alessandro CASTORINA ,  Giuseppe PALMISANO

IPC: H03F1/02 ,  H03F3/45 ,  H03K5/24

CPC classification number: H03F1/0233 ,  H03F3/45475 ,  H03K5/24 ,  H03F2200/105

Abstract: An envelope detector receives a modulated signal and a differential stage coupled to the detector produces a replica modulated signal compared to produce a PWM-modulated signal having on and off times. A first switch is actuated to short-circuit the input to the envelope detector. A second switch is actuated to feed back to a storage capacitor a signal indicative of the difference between inputs to the differential stage. A third switch is actuated to short-circuit an input to the comparator. Logic circuitry activates the switched to implement offset compensation where: the first, second and third switches are actuated in the absence of the PWM-modulated signal during start-up and standby phases; and the first, second and third switches are actuated during off times of the PWM-modulated signal in a working phase alternating with the start-up/standby phases.

公开(公告)号：US20250044409A1

公开(公告)日：2025-02-06

申请号：US18792205

申请日：2024-08-01

Applicant: STMicroelectronics International N.V.

Inventor： Giuseppe PAPOTTO ,  Alessandro PARISI ,  Giuseppe PALMISANO

IPC: G01S7/35 ,  G01S7/03 ,  G01S13/931

Abstract: First signal processing is applied to a first input signal oscillating at an input frequency and a first set of control signals to generate a first output signal oscillating at a multiple of the input frequency with an amplitude controlled by a control signal in the first set of control signals. Second signal processing is applied to a second input signal oscillating in quadrature at the input frequency and a second set of control signals to generate a second output signal that oscillates at the multiple of the input frequency with an amplitude controlled by a control signal in the second set of control signals. A further output signal, generated in response to the first and second output signals, oscillates at the multiple of the input frequency with a phase shift controlled by a ratio of control signal amplitudes for the first and second sets of control signals.