发明名称 |
Amplifier using a single polarity power supply and including depletion mode FET and negative voltage generator |
摘要 |
The present invention provides a power amplifier operating with a single power supply. The amplifier includes at least one depletion-mode FET for amplifying an ac signal and a negative voltage generator for providing a bias to the FET. Preferably the amplifier further includes a negative voltage regulator to provide a regulated bias to bias the FET for a class A, AB or B operation. The negative generator includes a multivibrator for producing two clock signals and a charge pump which receives the clock signals and produces a negative voltage. Advantageously the negative voltage is provided as a low reference potential to the multivibrator so that the clock signals it produced include a negative voltage period, which enables the charge pump to operate in a power efficient manner.
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申请公布号 |
US5892400(A) |
申请公布日期 |
1999.04.06 |
申请号 |
US19960764350 |
申请日期 |
1996.12.12 |
申请人 |
ANADIGICS, INC. |
发明人 |
VAN SADERS, JOHN;BAYRUNS, ROBERT J. |
分类号 |
G05F3/24;H03F1/30;H03F3/217;H03K3/354;(IPC1-7):H03F3/16 |
主分类号 |
G05F3/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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