Frequency discriminator

专利名称：Frequency discriminator发明人：Katsuji Kimura,Tetsuya Okuzumi申请号：US07/890156申请日：19920529公开号：US05276368A公开日：19940104

摘要：A frequency discriminator is provided which comprises a phase shifter forshifting a phase of an IF signal, a multiplier for analogically multiplying the IF signal andan output signal of the phase shifter and outputting the resultant signal thus obtained asa differential current, a circuit for forming a differential current of a differential outputcurrent of the multiplier, an inverter circuit to be driven by the differential current thusformed, and a low-pass filter for integrating an output signal of the inverter circuit. Asthe circuit for forming the differential current thereof, a current mirror circuit is

preferably used. Thus, a quadrature-type frequency discriminator can be realized on a C-MOS integrated circuit.

申请人：NEC CORPORATION

代理机构：Sughrue, Mion, Zinn, Macpeak & Seas

更多信息请下载全文后查看