发明名称 |
DIFFERENTIAL AMPLIFIER CIRCUIT AMPLIFYING DIFFERENTIAL SIGNALS WITH SELECTIVELY SWITCHING BETWEEN DIFFERENTIAL SIGNALS AND AD CONVERTER APPARATUS |
摘要 |
A differential amplifier circuit is provided with an operational amplifier and a modulator. The operational amplifier includes a feedback capacitance, and amplifies an analog input signal and outputs an amplified analog output signal. The modulator is connected to a virtual ground point of an input terminal of the operational amplifier, and the modulator switches between a pair of inputted analog differential signals to alternately select one of the analog differential signals based on a predetermined modulation control signal, and outputs a selected analog differential signal. The differential amplifier circuit alternately folds and amplifies the analog input signal within a predetermined input level limit range to generate a signal having different polarities sequentially so as to start from a voltage potential of the virtual ground point at a timing of the modulation control signal. In addition, an converter apparatus is provided with the differential amplifier circuit.
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申请公布号 |
US2010103015(A1) |
申请公布日期 |
2010.04.29 |
申请号 |
US20090582305 |
申请日期 |
2009.10.20 |
申请人 |
YOSHIDA TAKESHI;MASUI YOSHIHIRO;IWATA ATSUSHI;GOTOH KUNIHIKO |
发明人 |
YOSHIDA TAKESHI;MASUI YOSHIHIRO;IWATA ATSUSHI;GOTOH KUNIHIKO |
分类号 |
H03M3/02;H03F3/38;H03M1/12 |
主分类号 |
H03M3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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