Patent ID: 9553572
Date: 2017-01-24
CPC Classifications: H02M,H03K

Claim:
1. A self clocking comparator for clocking a charge pump providing a high voltage output, comprising: a plurality of gain stages having a first input that receives a sense voltage indicative of the high voltage output of the charge pump, having a second input that receives a reference voltage, having a reset input, and having an output providing a compare voltage; wherein said plurality of gain stages assert said compare voltage to a first voltage level in a default state when said sense voltage is greater than said reference voltage, and wherein said plurality of gain stages assert said compare voltage to a second voltage level in a reset state when said sense voltage is less than said reference voltage; and a reset circuit having an input receiving said compare voltage and having an output providing a reset signal to said reset input of said plurality of gain stages, wherein said reset circuit asserts said reset signal to force said plurality of gain stages back to said default state in response to said compare voltage transitioning to said second voltage level, and wherein said reset circuit negates said reset signal when said compare voltage is at said first voltage level.