Patent ID: 9154121
Filing Date: 2015-10-06
Classification: H03F,H03K

Abstract:
1. A pulse width modulated signal generator, comprising: a period-change quantity-calculation module configured to calculate an amount of change in a period parameter of an output signal during a transition period between an output of a first signal waveform and an output of a second signal waveform using a first period parameter of the first signal waveform, a second period parameter of the second signal waveform, and a transition-period parameter indicating a predetermined number of steps in the transition period; a duty-change quantity-calculation module configured to calculate an amount of change in a duty ratio of the output signal during the transition period using a first duty parameter of the first signal waveform, a second duty parameter of the second signal waveform, and the transition-period parameter; a period-calculation module configured to calculate the period parameter for the output signal using the calculated amount of change in the period parameter of the output signal during the transition period; and a duty-calculation module configured to calculate the duty ratio for the output signal using the calculated amount of change in the duty ratio of the output signal during the transition period.