Patrick F Cooney

US Patent:

20200112317, Apr 9, 2020

Filed:

Aug 29, 2019

Appl. No.:

16/556070

Inventors:

- Singapore, SG
Patrick Cooney - San Jose CA, US
Adalberto Cantoni - San Jose CA, US
Joshua M. Bamford - San Jose CA, US

Assignee:

MEDIATEK Singapore Pte. Ltd. - Singapore

International Classification:

H03M 1/06
H03F 3/45
H03F 1/56
H04R 3/00

Abstract:

Described herein are DACs with low distortion for high dynamic range (HDR), extremely high dynamic range (EHDR), and other suitable applications. Some embodiments relate to a device including a DAC configured for coupling to an amplifier via a force path and a sense path. For example, the DAC may provide output current to the amplifier via the force path, and the DAC may sense the input voltage of the amplifier via the sense path. Accordingly, distortion such as harmonic distortion and/or gain offset from parasitic impedances in the force and/or sense paths may be reduced or eliminated. Some embodiments relate to a DAC including a voltage reference generator configured to compensate for variations in impedances of the DAC, such as due to semiconductor process variation. Accordingly, distortion in the DAC output due to variations in the DAC impedances may be reduced or eliminated.

US Patent:

20190288672, Sep 19, 2019

Filed:

Oct 11, 2018

Appl. No.:

16/157165

Inventors:

- Hsinchu, TW
Chan-Hsiang WENG - Hsinchu, TW
Patrick Cooney - San Jose CA, US
Stacy HO - San Jose CA, US

International Classification:

H03H 17/04

Abstract:

The invention provides an anti-aliasing filter (AAF) for discretization at a sampling period. The AAF may include an operational amplifier having an input terminal and an output terminal, a first capacitor coupled between the input terminal and the output terminal, a second capacitor, and a first switch coupled between the first capacitor and the second capacitor. During a first phase, the first switch may conduct the second capacitor to the first capacitor. During a second phase, the first switch may stop conducting the second capacitor to the first capacitor. The first phase may last for one said sampling period.