標題: Device for accurately measuring amplifier's open-loop gain with digital stimuli
作者: Hong Hao-Chiao
公開日期: 7-Feb-2012
摘要: A device capable of receiving one or more digital stimulus signals and accurately measuring an open-loop gain of an amplifier comprises: a digital charge converter (DCC), a charge integrator, an A/D converter, a control logic circuit and an arithmetic logic unit (ALU). The DCC and the charge integrator are composed of a plurality of switches, one or more sampling capacitor, at least one integrating capacitor and an operational amplifier under test (OPAUT) with a single-ended output or differential-ended outputs. The DCC, the charge integrator, and the A/D converter are controlled by control signals generated by the logic control circuit and can be reconfigured as a first-order Sigma-Delta modulator capable of receiving at least one of the digital input stimulus signals. The ALU calculates the open-loop gain of the OPAUT with single-ended output or differential-ended outputs according to the digital stimulus signals and the digital output of the first-order Sigma-Delta modulator.
官方說明文件#: G01R025/00
G01R027/00
G06F019/00
URI: http://hdl.handle.net/11536/104612
專利國: USA
專利號碼: 08112236
Appears in Collections:Patents


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  1. 08112236.pdf