发明授权
US07304538B2 Accurate quiescent current control scheme in floating controlled class AB amplifier
有权
浮动控制AB类放大器中的精确静态电流控制方案
- 专利标题: Accurate quiescent current control scheme in floating controlled class AB amplifier
- 专利标题(中): 浮动控制AB类放大器中的精确静态电流控制方案
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申请号: US10975107申请日: 2004-10-28
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公开(公告)号: US07304538B2公开(公告)日: 2007-12-04
- 发明人: Jungwoo Song
- 申请人: Jungwoo Song
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Sterne, Kessler, Goldstein & Fox PLLC
- 主分类号: H03F3/185
- IPC分类号: H03F3/185
摘要:
Provided is an amplifier including a system for controlling output stage quiescent current. The amplifier includes a driving stage including first pmos and nmos transistors coupled together, and an output stage connected to the driving stage. The output stage includes second pmos and nmos transistors coupled together. The amplifier also includes a quiescent control stage connected to the driving stage and including third pmos and nmos transistors coupled together, fourth pmos coupled to third pmos and 4th nmos coupled to 3rd nmos. A topology of the coupled third pmos and nmos transistors substantially matches a topology of the coupled first pmos and nmos transistors, and 4th pmos and nmos match to 2nd pmos and nmos.
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