| 摘要 |
An improved voltage tolerant protection circuit for input buffer comprising a transmission gate circuit receiving input from the pad for passing the input signal to the input of the input buffer, a control signal generator electrically coupled between the transmission gate circuit and the pad to provide a control signal for operating the transmission gate circuit, and an N-Well generation circuit electrically coupled between the pad and the transmission gate circuit, and also electrically coupled to the control signal generator for generating a bias signal for the transmission gate circuit and the control signal generator. Thus, the present invention provides a voltage tolerant protection circuit that prevents electrical stress on transistors, minimizes power supply consumption and transfers signals without any change in amplitude.
|
