Patent ID: 6226324
Filing Date: 2001-05-01
Classification: H03K

Abstract:
A PWM (""pulse width modulation"") generation circuit comprising:a main PWM signal generator having a main PWM output;a trimming signal generator having a trimming output, said trimming output producing pulses;a summer having a first input, a second input and a trimmed PWM output, said first input being connected to said main PWM output, and said second input being connected to said trimming output, wherein said trimmed PWM output has a duty cycle of said main PWM output modified as a function of said trimming output;a low-pass filter coupled to said trimmed PWM output, wherein said low-pass filter provides an analog voltage output; anda voltage to current converter having a voltage input, said voltage input coupled to said analog voltage output of said low-pass filter, wherein said voltage to current converter provides a current output corresponding to said analog voltage output.