Patent ID: 6433622
Filing Date: 2002-08-13
Classification: H03K

Abstract:
A voltage driver having an output node, comprising:a switching circuit having a control terminal and an output terminal coupled to the output node; an operational amplifier having a first input terminal connected to the output node, a second input terminal connected to an input reference voltage, and an output terminal connected to the control terminal of the switching circuit, the amplifier being controlled by an external disable signal for switching on and off the amplifier; and a slew rate circuit coupled between the output node and the control terminal of the switching circuit, the slew rate circuit including at least one diode connected transistor; wherein the amplifier, upon being switched on, drives the control terminal of the switching circuit to cause the output node to match the reference voltage; wherein the amplifier, upon being switched off, drives the control terminal of the switching circuit to cause the output node to have a high impedance.