Recording video signal with improved noise separation - using bridged T filter between frequency modulator output and current amplifier with linear characteristic

摘要

A video signal (1) is frequency modulated (2) and fed via a filter (5) to a voltage-current amplifier (3) feeding a head. The filter (5) comprises two equal resistances in series, in the longitudinal path of a T-member, a first capacitor and a series first inductor forming the transverse path of the T, and a bridge paralleling the T, comprising a parallel circuit of a second capacitor, and second inductor. The filter characteristic drops linearly from the lowest to the highest frequency. ADVANTAGE - Improves matching of recording current to magnet tape characteristics.