Invention Grant
- Patent Title: Delta sigma modulator with dynamic error cancellation
-
Application No.: US15226436Application Date: 2016-08-02
-
Publication No.: US09660665B2Publication Date: 2017-05-23
- Inventor: Eeshan Miglani , Karthikeyan Gunasekaran , Santhosh Kumar Gowdhaman , Shagun Dusad
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Charles A. Brill; Frank D. Cimino
- Priority: IN4089/CHE/2015 20150806
- Main IPC: H03M3/00
- IPC: H03M3/00 ; H03M1/74 ; H03M1/12 ; H03M1/00

Abstract:
The disclosure provides a delta sigma modulator that includes a first input port and a second input port. These ports receive a differential input signal. A DAC is coupled to the first input port and the second input port, and receives a differential feedback signal and a plurality of selection signals. A loop filter generates a differential filtered signal in response to a differential error signal. The differential error signal is proportional to a difference in the differential input signal and the differential feedback signal. A quantizer generates a quantized output signal in response to the differential filtered signal. A modified DWA block coupled between the quantizer and the DAC, generates the plurality of selection signals in response to a chop clock, a regular clock, the quantized output signal and a plurality of selection index signals. A selection index signal is dependent on previously generated plurality of selection signals.
Public/Granted literature
- US20170041019A1 DELTA SIGMA MODULATOR WITH DYNAMIC ERROR CANCELLATION Public/Granted day:2017-02-09
Information query