Signal processing system

摘要: An improved system for processing an electrical velocity information signal in a detecting which detector is utilized developing signal, such as Doppler having characteristic (e.g. frequency) that varies systematically with the object's velocity. A converter develops oscillatory frequency accordance characteristic. tracking filter center filters all frequencies other than frequency. generator responsive to of passed by generating output preset ratio relative frequency, whereby relatively noise-free and has represents object being detected. Another feature disclosed embodiment invention utilizes switching network comprising pair flip-flops shift registers are generated voltage-controlled oscillator alternately charging discharging storage capacitor coupled inverting input operational amplifier used comparator. variable resistance placed either or path op amp error voltage control VCO thus provide locked loop.