the CMOS power reset circuit (CMOS POWER ON RESET CIRCUIT)

摘要

the activation of the power supply in response to the reset signal, the occurrence of CMOS power - only three times in the clam ping stage (14) and a hysteresis switching stage (16) includes. the clam ping stage (14) n - channel resistance (M1), the first resistance (R1) and the second resistor (R2) structure. the hysteresis switching stage (16) is a p - channel transistor (M2 chin up, put down the n - channel transistor (M3), current - source transistor (M4), the second n - channel full down transistor (M5) and the inverter (G1) etc..