发明名称 |
Distortion-free chopper-based signal mixer |
摘要 |
An AM-modulated carrier signal is converted to a lower carrier frequency through mixing with a square wave local oscillator signal. A field-effect transistor chops the modulated signal according to the square wave signal so that a chopped or sampled version of the modulated signal is created without passing the signal through a semiconductor junction. A filter then selects the desired mixing product. Thus, a distortion free mixing of the signal is obtained using low cost components including a JFET switch and a square wave output from a microcontroller.
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申请公布号 |
US5697091(A) |
申请公布日期 |
1997.12.09 |
申请号 |
US19960597755 |
申请日期 |
1996.02.07 |
申请人 |
FORD MOTOR COMPANY |
发明人 |
HIRSCHENBERGER, FRANK MICHAEL;HARRIS, RICHARD BRUCE;WHITECAR, JOHN ELLIOTT |
分类号 |
H03D7/12;H04B1/26;(IPC1-7):H04B1/26 |
主分类号 |
H03D7/12 |
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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