发明名称 |
Amplifier, a residue amplifier, and an ADC including a residue amplifier |
摘要 |
An amplifier, comprising: an input node; an output node; a gain stage having a gain stage inverting input, a gain stage non-inverting input and a gain stage output; a feedback capacitor connected in a signal path between the gain stage output and the gain stage inverting input; a sampling capacitor connected between the input node and the gain stage inverting input, and a controllable impedance in parallel with the feedback capacitor, wherein the controllable impedance is operable to switch between a first impedance state in which it does not affect current flow through the feedback capacitor, and a second impedance state in which it cooperates with the feedback capacitor form a bandwidth limiting circuit. |
申请公布号 |
US9231539(B2) |
申请公布日期 |
2016.01.05 |
申请号 |
US201313787065 |
申请日期 |
2013.03.06 |
申请人 |
ANALOG DEVICES GLOBAL |
发明人 |
Lyden Colin G.;Hurrell Christopher Peter;Hummerston Derek |
分类号 |
H03F3/45;H03M1/16 |
主分类号 |
H03F3/45 |
代理机构 |
Kenyon & Kenyon, LLP |
代理人 |
Kenyon & Kenyon, LLP |
主权项 |
1. An amplifier, comprising:
an input node, the input node being connectable to a first signal input node and a second signal input node; a gain stage having a gain stage inverting input, a gain stage non-inverting input and a gain stage output; a feedback capacitor connected in a signal path between the gain stage output and the gain stage inverting input; a sampling capacitor connected between the input node and the gain stage inverting input; and a controllable resistive impedance in parallel with the feedback capacitor, wherein the controllable resistive impedance is operable to switch between a first impedance state in which the controllable resistive impedance does not affect current flow through the feedback capacitor, and a second impedance state in which the controllable resistive impedance cooperates with the feedback capacitor to form a bandwidth limiting circuit. |
地址 |
Hamilton BM |