公开(公告)号：US5493713A

公开(公告)日：1996-02-20

申请号：US175785

申请日：1993-12-30

Applicant: Wayne L. Horsfall ,  Gary Shipton

Inventor： Wayne L. Horsfall ,  Gary Shipton

IPC: H03L7/08 ,  H03D3/02 ,  H03D3/24 ,  H04B1/06

CPC classification number: H03D3/244

Abstract: A method of demodulating an FM carrier wave and a demodulating circuit are described which utilize a gain control circuit. An output is supplied from the gain control circuit to a phase locked loop circuit tuned to a selected carrier wave frequency. A first output of the phase locked loop circuit is used to generate a tuned gain control signal dependent on the amplitude of the input FM carrier wave to which the phase locked loop is tuned and the tuned gain control signal is used to control the gain of the gain control circuit.

Abstract translation: 描述了一种利用增益控制电路解调FM载波和解调电路的方法。 输出从增益控制电路提供给被调谐到所选择的载波频率的锁相环电路。 锁相环电路的第一输出用于产生调谐增益控制信号，该信号取决于调谐了锁相环的输入FM载波的振幅，调谐增益控制信号用于控制 增益控制电路。

公开(公告)号：US5446411A

公开(公告)日：1995-08-29

申请号：US176342

申请日：1993-12-30

Applicant: Wayne L. Horsfall ,  Gary Shipton

Inventor： Wayne L. Horsfall ,  Gary Shipton

IPC: H03L7/08 ,  H03D3/02 ,  H03D3/24 ,  H03L7/087 ,  H03L7/113

CPC classification number: H03L7/113 ,  H03D3/244

Abstract: Apparatus for setting up the tuning frequency of a phase locked loop is provided which utilises the voltage controlled oscillator of the phase locked loop itself. The apparatus includes signal translation circuitry which can provide a control voltage to the VCO of the phase locked loop dependent on a tuning voltage which is alterable in response to the frequency of the signal output by the VCO.

Abstract translation: 提供了设置锁相环的调谐频率的装置，其利用锁相环本身的压控振荡器。 该装置包括信号转换电路，其可以根据可响应于VCO输出的信号的频率而改变的调谐电压向VCO的VCO提供控制电压。