发明名称 |
Phase-sensitive rectifier arrangement with integration effect |
摘要 |
A circuit combining the functions of phase-sensitive rectifier and integrator uses an operational amplifier and capacitors. A control signal switches a capacitor in and out of a feedback loop containing a second feedback capacitor, resulting in a residual charge in the second feedback capacitor if there is a phase-difference between an input signal and the control signal. The invention may also incorporate an automatic offset compensation circuit by using additional switches and a second control signal. The capacitor that is switched in and out of the feedback loop is coupled to a compensation capacitor during periods when the capacitor is not being used for the phase-sensitive rectifier and integrator portions of the circuit. The circuit arrangement allows the use of long time constants in the integrator portion of the circuit.
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申请公布号 |
US5376891(A) |
申请公布日期 |
1994.12.27 |
申请号 |
US19920967635 |
申请日期 |
1992.10.28 |
申请人 |
SGS-THOMSON MICROELECTRONICS GMBH |
发明人 |
KIRCHLECHNER, PETER |
分类号 |
H03D3/02;H03D1/22;H03H19/00;H03L7/085;H03L7/093;(IPC1-7):H01D3/02 |
主分类号 |
H03D3/02 |
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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