| 发明名称 | DC offset canceller | ||
| 摘要 | Two LPFs are disposed on the output side of a differential amplifier to remove an AC component contained in an output signal output from a first output terminal of the differential amplifier and an AC component contained in an output signal output from a second output terminal of the differential amplifier. The lowpass filter voltage of the output signal output from the first output terminal with the AC component removed is input to one of input terminals of one of two comparators, and the lowpass filter voltage of the output signal output from the second output terminal with the AC component removed is input to one of input terminals of the other comparator. | ||
| 申请公布号 | US9203364(B2) | 申请公布日期 | 2015.12.01 |
| 申请号 | US201414574052 | 申请日期 | 2014.12.17 |
| 申请人 | PANASONIC CORPORATION | 发明人 | Abe Takayuki;Imamura Koji;Satou Kazutoshi;Nakamura Shigeki |
| 分类号 | H03F3/45;H03F1/02 | 主分类号 | H03F3/45 |
| 代理机构 | Greenblum & Bernstein, P.L.C. | 代理人 | Greenblum & Bernstein, P.L.C. |
| 主权项 | 1. A DC offset canceller for use in a differential amplifier, comprising: a first lowpass filter to which a voltage of a first output terminal of the differential amplifier is input; a first comparator to which an output of the first lowpass filter and a reference voltage generated by a reference voltage source are input, an output of the first comparator being input to a first output DC voltage control terminal of the differential amplifier; a second lowpass filter to which a voltage of a second output terminal of the differential amplifier is input; and a second comparator to which an output of the second lowpass filter and the reference voltage generated by the reference voltage source are input, an output of the second comparator being input to a second output DC voltage control terminal of the differential amplifier. | ||
| 地址 | Osaka JP | ||