Invention Grant
- Patent Title: Suppressing signal transfer function peaking in a feedforward delta sigma converter
- Patent Title (中): 抑制前馈ΔΣ转换器中的信号传递函数峰值
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Application No.: US15067847Application Date: 2016-03-11
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Publication No.: US09564916B2Publication Date: 2017-02-07
- Inventor: Abhishek Bandyopadhyay
- Applicant: ANALOG DEVICES, INC.
- Agency: Patent Capital Group
- Main IPC: H03M3/00
- IPC: H03M3/00

Abstract:
A modified topology for a CTDSM (referred herein as “SCFF”) can effectively deal with signal transfer function (STF) peaking, an inherent property of continuous time feedforward delta sigma converters. The SCFF approach involves providing an additional digital-to-analog (DAC) feedback path to the input of the second integrator (incurring an additional DAC in the circuitry, converting the output of the quantizer into an analog signal and feeding the analog signal to the input of the second integrator). Furthermore, the SCFF approach involves providing two feed-ins: a first feed-in to the input of the second integrator and a second feed-in to the input of the third integrator. The first feed-in can be negative. Advantageously, the modified continuous time delta sigma modulator implementing this approach alleviates some of the peaking issues in the signal transfer function while still enjoy low power consumption.
Public/Granted literature
- US20160359499A1 SUPPRESSING SIGNAL TRANSFER FUNCTION PEAKING IN A FEEDFORWARD DELTA SIGMA CONVERTER Public/Granted day:2016-12-08
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