公开(公告)号：US20250080144A1

公开(公告)日：2025-03-06

申请号：US18460238

申请日：2023-09-01

Applicant: Apple Inc.

Inventor： Long Kong ,  Shinan Lu ,  Utku Seckin

IPC: H04B1/036 ,  H04B1/04

Abstract: The present disclosure relates to compensating for temperature variation of a mixer. Embodiments herein may include the mixer, a calibration circuit coupled to the mixer, a replica mixer circuit coupled to the calibration circuit, and a temperature compensation circuit coupled to the calibration circuit. The replica mixer circuit may generate or be used to generate a reference voltage that varies with a common mode voltage and/or a threshold voltage of a replica mixer. The reference voltage may be applied to a resistor ladder of the calibration circuit to adjust a bias voltage and compensate for temperature variations. Further, the temperature compensation circuit may generate a temperature coefficient that may be applied to a current going through the calibration circuit to facilitate compensating for temperature variation.

公开(公告)号：US20250080126A1

公开(公告)日：2025-03-06

申请号：US18460259

申请日：2023-09-01

Applicant: Apple Inc.

Inventor： Long Kong ,  Shinan Lu ,  Utku Seckin

IPC: H03M1/06 ,  G06F17/14 ,  H03M1/08

Abstract: The present disclosure relates to compensating for temperature variation of a mixer. Embodiments herein may include performing a single-point Fast Fourier Transform (FFT) (or complex downconversion with DC average) for a number of samples to obtain a transform for each of the number of samples, phase aligning a set of phases associated with each transform, and averaging each transform to generate an analog-to-digital converter (ADC) power value. Further, the disclosed embodiments may include generating a compensation value based on the analog-to-digital converter power value and applying the compensation value to the calibration circuit of the mixer to compensate for a second-order intermodulation product.