发明授权
- 专利标题: High beta output stage for high speed operational amplifier
- 专利标题(中): 高速运算放大器的高β输出级
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申请号: US10005463申请日: 2001-12-03
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公开(公告)号: US06630866B2公开(公告)日: 2003-10-07
- 发明人: Neil Gibson , Marco Corsi , Tobin Hagan
- 申请人: Neil Gibson , Marco Corsi , Tobin Hagan
- 主分类号: H03F326
- IPC分类号: H03F326
摘要:
The present invention provides an high beta, high speed operational amplifier output stage (100). The advantages of the operational amplifier output stage over conventional methods disclosed is up to &bgr;2 rather than a single beta. The present invention achieves this using an pre-driver sub-stage (122) having a plurality of translinear loops so that there is no net signal loss to the final sub-stage (123). The output of the disclosed operational amplifier output stage takes the form: &dgr;Io≈&bgr;n*&bgr;p*&dgr;Iin. When used with a localized feedback circuitry, speed performance is increased and bandwidth is extended.
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