Invention Grant
- Patent Title: Sense amplifier stabilization with switched series resistor
-
Application No.: US14606996Application Date: 2015-01-27
-
Publication No.: US09817513B2Publication Date: 2017-11-14
- Inventor: Weijun Yao , Wei Hsin Yao , Yingxuan Li
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Morrison & Foerster LLP
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044

Abstract:
A sense amplifier can be designed with a series variable resistance circuit to dynamically adjust an input resistance in series with the sense amplifier for stability during the different operating modes. In some examples, a switchable resistor can be switched into the input path of the sense amplifier for stability when required by increased capacitive loading of the sense electrodes, and can be switched out of the input path of the sense amplifier when unnecessary for stability. In some examples, an adjustable resistor can be coupled to and in series with the input of the sense amplifier. The resistance of the adjustable resistor can be tuned to stabilize the sense amplifier during operating modes having increased capacitive loading from the sense electrodes and can be minimized when additional input resistance is unnecessary for stability.
Public/Granted literature
- US20160216836A1 SENSE AMPLIFIER STABILIZATION WITH SWITCHED SERIES RESISTOR Public/Granted day:2016-07-28
Information query