公开(公告)号：US6014049A

公开(公告)日：2000-01-11

申请号：US431001

申请日：1995-04-28

申请人： James Carter Bach ,  John J. Baker ,  Robert Joseph Stock ,  Richard J. Szep ,  Gerlad A. Kilgour

发明人： James Carter Bach ,  John J. Baker ,  Robert Joseph Stock ,  Richard J. Szep ,  Gerlad A. Kilgour

IPC分类号： H03K17/16 ,  H03K5/12

CPC分类号： H03K17/163

摘要： A modulator has an FET output driver for applying repetitive pulses to an inductive load. A predriver comprises a resistor and capacitor in parallel across the FET source and gate for shaping the control voltage. A constant current source, turned on and off by an input signal, couples the shaping circuit to ground. The resistor and capacitor values determine the rate of control voltage change which is the same for turn-on and turn-off, to control the driver current slew rate for minimizing RFI emissions.

摘要翻译： 调制器具有用于向感性负载施加重复脉冲的FET输出驱动器。 预驱动器包括在FET源极和栅极上并联的电阻器和电容器，用于对控制电压进行整形。 通过输入信号导通和关断的恒流源将整形电路耦合到地。 电阻和电容值决定了接通和关断相同的控制电压变化率，以控制驱动器电流转换速率，以最大限度地减少RFI排放。