Patent ID: 6184594
Filing Date: 2001-02-06
Classification: H02M

Abstract:
A charge pump circuit comprising:a first stage coupled to receive an input signal, wherein the first stage is configured to generate first output signal and a complementary second output signal in response to the input signal, the first and second output signals each varying between a first voltage and a second voltage that is approximately twice the first voltage;a second stage coupled to receive the first and second output signals from the first stage, wherein the second stage is configured to generate a third output signal and a complementary fourth output signal in response to the first and second output signals, each of the third and fourth output signals varying between the second voltage and a third voltage that is approximately twice the second voltage, the second stage including a first transistor having a drain terminal coupled to receive the first output signal from the first stage, and a second transistor having a drain terminal coupled to receive the second output signal from the first stage; anda feedback circuit configured to route the fourth output signal to a gate of the first transistor and configured to route the third output signal to a gate of the second transistor.