发明名称 |
FM detector circuit with error voltage applied to phase shifting circuit |
摘要 |
In an FM detector circuit, a phase-shifting circuit is constituted by integrating circuits each consisting of a transconductance amplifier and capacitor. The phase-shifting circuit being arranged to cause limiter signal to be phase-shifted by 90 degrees at center frequency. A multiplying circuit is provided which is arranged to be provided with said limiter signal and output of said phase-shifting circuit, thereby effecting phase-detection of said limiter signal. Further, an error amplifier is provided which is supplied with a smoothed version of detection output derived from said multiplying circuit. The arrangement is made such that output of the error amplifier is applied to the transconductance amplifiers constituting said phase-shifting circuit.
|
申请公布号 |
US5302910(A) |
申请公布日期 |
1994.04.12 |
申请号 |
US19920995035 |
申请日期 |
1992.12.22 |
申请人 |
TOKO, INC. |
发明人 |
KONDO, HIROSHI;FUKAI, ISAO |
分类号 |
H03D3/06;H03D3/00;H03D3/14;H03D3/22;(IPC1-7):H03D3/00 |
主分类号 |
H03D3/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|