发明名称 |
Automatic gain control for tank type voltage controlled oscillator |
摘要 |
A voltage controlled oscillator circuit of a type having a tank circuit for generating oscillations which includes a means for establishing a fixed bias voltage with respect to ground at a bias end of said tank circuit, means for drawing current from an a.c. end of said tank so as to control the tank gain, and an AGC capacitor. A constant current source is coupled to the AGC capacitor for supplying it with a constant charging current. Means are provided for discharging the AGC capacitor at a voltage level determined by a ratio of resistors and a transistor emitter-base ratio. |
申请公布号 |
US4763086(A) |
申请公布日期 |
1988.08.09 |
申请号 |
US19870049186 |
申请日期 |
1987.05.12 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
HAIGHT, MICHAEL H.;GIOLMA, WILLIAM H.;BOUCHER, RICHARD |
分类号 |
G09G5/399;H03B5/12;H03L5/00;(IPC1-7):H03B5/08 |
主分类号 |
G09G5/399 |
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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