公开(公告)号：US20250038708A1

公开(公告)日：2025-01-30

申请号：US18361302

申请日：2023-07-28

Applicant: Apple Inc.

Inventor： Anandaroop Chakrabarti

IPC: H03D7/12 ,  H04B1/40

Abstract: An electronic device may include wireless circuitry with a mixer. The mixer may include a transconductor with first and second input transistors, a switching quad with first and second pairs of mixer transistors, and a transformer coupled between the transconductor and the switching quad. The transformer may have a primary winding and a secondary winding. The transformer may have a conductive path that couples a center tap contact of the primary winding to a center tap contact of the secondary winding. The conductive path may configure the transformer to share a DC bias current between the transconductor and the switching quad. This may eliminate the need to bias the transconductor and the switching quad using different power supply voltages, thereby minimizing power consumption without sacrificing performance.

公开(公告)号：US20250038709A1

公开(公告)日：2025-01-30

申请号：US18475908

申请日：2023-09-27

Applicant: Apple Inc.

Inventor： Anandaroop Chakrabarti

IPC: H03D7/12 ,  H04B1/40

Abstract: An electronic device may include wireless circuitry with a mixer. The mixer may include a transconductor with first and second input transistors, a switching quad with first and second pairs of mixer transistors, and a transformer coupled between the transconductor and the switching quad. The transformer may have a primary winding and a secondary winding. The transformer may have a conductive path that couples a center tap contact of the primary winding to a center tap contact of the secondary winding. The conductive path may configure the transformer to share a DC bias current between the transconductor and the switching quad. This may eliminate the need to bias the transconductor and the switching quad using different power supply voltages, thereby minimizing power consumption without sacrificing performance.

公开(公告)号：US20240421769A1

公开(公告)日：2024-12-19

申请号：US18336786

申请日：2023-06-16

Applicant: Apple Inc.

Inventor： Omar E. Elaasar ,  Shan He ,  Gang Zhang ,  Anandaroop Chakrabarti

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.