| 发明名称 | Amplifier apparatus and methods using variable capacitance dependent on feedback gain | ||
| 摘要 | An apparatus includes an operational amplifier circuit comprising at least one operational amplifier and a feedback circuit coupled between the output terminal and input terminal of the operational amplifier circuit and configured to apply a feedback gain to an output signal at the output of the first operational amplifier. The apparatus further includes a variable compensation capacitor coupled to the output terminal of the operational amplifier circuit and configured to vary a capacitance thereof responsive to the feedback gain. | ||
| 申请公布号 | US9270232(B2) | 申请公布日期 | 2016.02.23 |
| 申请号 | US201213618156 | 申请日期 | 2012.09.14 |
| 申请人 | Samsung Electronics Co., Ltd. | 发明人 | Park Yu Jin;Kang Soon Hwa;Kwon Min Ho;Kim Jae Hong;Yoo Kwi Sung;Lim Seung Hyun |
| 分类号 | H04N5/335;H03F1/34;H03F1/08;H03F3/45;G11C27/02 | 主分类号 | H04N5/335 |
| 代理机构 | Myers Bigel & Sibley, P.A. | 代理人 | Myers Bigel & Sibley, P.A. |
| 主权项 | 1. An apparatus comprising: an operational amplifier circuit comprising at least one operational amplifier; a feedback circuit coupled between an output terminal and an input terminal of the operational amplifier circuit and configured to apply a feedback gain to an output signal at the output terminal of the operational amplifier circuit; and a variable compensation capacitor coupled to the output terminal of the operational amplifier circuit and configured to vary a capacitance thereof responsive to the feedback gain, wherein the capacitance of the variable compensation capacitor decreases to increase stability and decrease bandwidth in an operation period in which the feedback gain is less than 1 and wherein the capacitance of the variable compensation capacitor increases in a reset period in which the feedback gain is 1. | ||
| 地址 | KR | ||