Invention Grant
US09484944B2 Current counting analog-to-digital converter for load current sensing including dynamically biased comparator
有权
用于负载电流检测的电流计数模数转换器，包括动态偏置比较器
- Patent Title: Current counting analog-to-digital converter for load current sensing including dynamically biased comparator
- Patent Title (中): 用于负载电流检测的电流计数模数转换器，包括动态偏置比较器
-
Application No.: US14329661Application Date: 2014-07-11
-
Publication No.: US09484944B2Publication Date: 2016-11-01
- Inventor: Vincenzo F Peluso
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM INCORPORATED
- Current Assignee: QUALCOMM INCORPORATED
- Current Assignee Address: US CA San Diego
- Agency: Haynes and Boone, LLP
- Main IPC: G01R19/165
- IPC: G01R19/165 ; H03M1/34 ; H03M1/60 ; H03K5/24
Abstract:
In one embodiment, a circuit comprises first and second capacitors configured to receive a sense current in first and second modes, respectively. A comparator is coupled to the first capacitor to compare a voltage of the first capacitor to a reference voltage and generate a count signal in response to the voltage of the first capacitor reaching the reference voltage in the first mode. The comparator is coupled to the second capacitor to compare a voltage of the second capacitor to the reference voltage and generate the count signal in response to the voltage of the second capacitor reaching the reference voltage in the second mode. A reset circuit discharges the first capacitor in the second mode and the second capacitor in the first mode in response to the count signal. A counter increments a count of a number of occurrences of the count signal.
Public/Granted literature
Information query
