| 摘要 |
A push-pull output buffer for use with an integrated circuit, such as a CMOS device, uses a driver gate voltage Feedback loop to control slew rate of the driver and reduce crowbar current. The feedback loop is coupled with the driver's control gate and functions to drive the gate up to an initial, intermediate level of voltage. A delay circuit coupled between the driver control gate and the buffer input delays the delivery of a control signal that couples the driver control gate to a higher level of voltage, such that an external load connected to the buffer's output is also driven to a higher level. A one way switch circuit coupled between the delay circuit and the feedback loop prevents interference there between until the higher level of voltage is applied to the control gate.
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