发明名称 |
Active filter type signal adjusting circuit |
摘要 |
A first operational amplifier differentially operates a signal to be adjusted input by an input unit and an adjusted signal output by an output unit. A second operational amplifier differentially operates a first output from the first operational amplifier and the adjusted signal. A buffer supplies a second output from the second operational amplifier to the output unit as the adjusted signal. A first adder obtains a sum component of a first signal obtained by multiplying a first variable m with the signal to be adjusted and a second signal obtained by multiplying a second variable 1-n with the adjusted signal. A first capacitor superposes the sum component of the first and second signals on the first output to supply a superposed signal to the second operational amplifier. A second adder obtains the signal to be adjusted or a component obtained by multiplying the first variable m with the signal to be adjusted as a third signal. A second capacitor superposes the third signal on the second output to supply a superposed signal to the buffer. The first and second variables m and 1-n are selected as desirable values in an adjusting mode and are respectively set to be m=n=1 (where 0</=n and m</=1) in a non-adjusting mode.
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申请公布号 |
US4851718(A) |
申请公布日期 |
1989.07.25 |
申请号 |
US19880239656 |
申请日期 |
1988.09.02 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
HAGINO, HIDEYUKI;KUSANO, TAKAHIRO |
分类号 |
H03H11/04;H03H11/12 |
主分类号 |
H03H11/04 |
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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