- 专利标题： Programmable gain amplifier and a delta sigma analog-to-digital converter containing the PGA
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申请号： US16933599申请日： 2020-07-20
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公开(公告)号： US11522554B2公开(公告)日： 2022-12-06
- 发明人: Jun Zhang
- 申请人： Texas Instruments Incorporated
- 申请人地址： US TX Dallas
- 专利权人： Texas Instruments Incorporated
- 当前专利权人： Texas Instruments Incorporated
- 当前专利权人地址： US TX Dallas
- 代理商 Krista Y. Chan; Charles A. Brill; Frank D. Cimino
- 主分类号： H03G3/20
- IPC分类号： H03G3/20 ; H03M1/18 ; H03G1/00 ; H03F1/38 ; H03M3/00 ; H03F3/45 ; H03G3/00
摘要：
A circuit includes an operational amplifier and a resistor network coupled to an output of the operational amplifier. The resistor network includes a first set of resistors coupled between the output of the operational amplifier and a first node of the resistor network, wherein the resistors of the first set are electrically connected in series with each other, a second set of resistors coupled between the first node and a second node of the resistor network, wherein the resistors of the second set are electrically connected in series with each other and include a first number of resistors, a third set of resistors coupled between the second node and a third node of the resistor network, wherein the third node is coupled to a first voltage, and wherein the resistors of the third set are electrically connected in parallel with each other and include a second number of resistors, and a resistor coupled between the first node and the second node and arranged in parallel with the second set of resistors.
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