Patent ID: 7449854
Filing Date: 2008-11-11
Classification: H02M,H02P,H03K

Abstract:
1. A PWM (Pulse Width Modulation) signal generation apparatus comprising: an up/down counter; a rewritable compare register storing a compare value; a comparator comparing the compare value of the compare register with a count value of the up/down counter and outputting an identity signal; a PWM signal generation unit specifying a pulse width of a PWM signal according to a first identity signal from the comparator in a count up operation of the up/down counter and a second identity signal from the comparator in a count down operation of the up/down counter; and an additional bit setting register storing an additional bit provided to change the pulse width of the PWM signal, wherein the PWM signal generation unit changes the pulse width of the PWM signal according to the additional bit.