Invention Application
- Patent Title: Methods and Circuitry for Reducing Mixer Harmonics Conversion Gain and Local Oscillator Fundamental and Harmonics Feedthrough
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Application No.: US18336786Application Date: 2023-06-16
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Publication No.: US20240421769A1Publication Date: 2024-12-19
- Inventor: Omar E. Elaasar , Shan He , Gang Zhang , Anandaroop Chakrabarti
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Main IPC: H03D7/14
- IPC: H03D7/14

Abstract:
Mixer circuitry can include a first pair of transistors coupled to a first tail node and configured to receive a local oscillator signal, a second pair of transistors coupled to a second tail node and configured to receive the local oscillator signal, a first digital-to-analog converter, a second DAC coupled between the first DAC and of the first pair of transistors, and a third DAC coupled between the first DAC and the second pair of transistors. During a first phase, control circuitry can sweep the first DAC to trim a first and/or other odd order local oscillator feedthrough. During a second phase, the control circuitry can sweep the second DAC to trim a second and/or other even order local oscillator feedthrough. During a third phase, the control circuitry can sweep the second and third DACs to reject signals associated with a second harmonic conversion gain of the mixer circuitry.
Information query
IPC分类: