device for damping mechanical vibrations appearing during the start-up of a transport system of a tape in a magnetic tape apparatus

摘要

A circuit is used for inhibiting mechanical vibration, esp. mechanical vibration generated during start up of a magnetic tape transporting capstan(A) in a tape recorder. There is a tachometer(T) which delivers revolution count data from the drive motor (M) to a power supply amplifier (V) over a feedback loop. An LC parallel oscillating circuit is connected across the amplifier and motor of counter the vibrational effect by virtue of its preselected resonant frequency.