Driving circuit, MOS transistor using the same and corresponding applications

摘要

A first principle on which the driver circuit of this invention operates is to delay the turning on of the MOS transistor (M2) by utilizing the time-wise pattern of the circuit input (G) signal rather than generating a delay within the circuit itself. The basic idea is one of using a threshold type of circuit element and arranging for no current to flow toward or from, depending on the type of the MOS transistor, the control terminal before the voltage at the circuit input exceeds a predetermined value. This is achieved, for example, by coupling a Zener diode (D1) serially to the control terminal. Where the input signal is of a kind which increases with a degree of uniformity, the time required to exceed that threshold will correspond to the desired delay. Thus, the driver circuit can match the dynamic range of the input signal automatically. <IMAGE>