Patent ID: 6121803
Filing Date: 2000-09-19
Classification: H03K

Abstract:
A pulse generator for generating a clock pulse from an output terminal according to a source voltage, said pulse generator comprising:a first circuit coupled between a first terminal which receives the source voltage and a second terminal which receives a reference voltage, said first circuit having a third terminal and a capacitive element connected between the third terminal and the second terminal, said first circuit for changing a voltage level of the third terminal according to a capacity of the capacitive element corresponding to a changing of the source voltage;a first conduction type first transistor having a gate and first and second electrodes, the gate electrode thereof coupled to the third terminal, the first electrode thereof receiving the source voltage, and the second electrode thereof coupled to the output terminal;a second conduction type second transistor having a gate and first and second electrodes, the gate electrode thereof coupled to the third terminal, and the first electrode thereof coupled to the output terminal;a second circuit having n second conduction type third transistors configured in a cascade connection, wherein n.gtoreq.1, each of said third transistors having a gate and first and second electrodes, wherein the gate electrode of each third transistor is coupled to the third terminal, the first electrode of one of said third transistors located at one end of the cascade connection is coupled to the second electrode of said second transistor, and the second electrode of one of said third transistors located at the other end of the cascade connection receives the reference voltage; anda coupling circuit coupled between the first electrode and the second electrode of one of said third transistors for controlling an electrical connection between the first and the second electrodes.