The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1998
Filed:
May. 22, 1996
Dong Soo Cho, Kyungki-do, KR;
LG Semicon Co., Ltd., Cheongju, KR;
Abstract
A pulse width modulation (PWM) circuit is disclosed for multiple channels. The circuit allows output pulses of a PWM signal for each channel to be distributed not simultaneously but with a time difference so that the power consumption is temporally distributed. The PWM circuit includes a counter for counting input clocks to generate a counting signal of multiple bits, a counter changing means connected to the counter for changing a bit value of the counting signal, a register for receiving data input from a data bus and holding the received data, a comparator connected to the register and the counter changing means for outputting a setting signal if the bit value counting signal changed from the counter changing means reaches a predetermined level, and outputting a coincidence signal if the compared data of the register and the changed counting signal coincide, and a pulse output portion connected to the comparator for setting output pulses if the setting signal is generated, and resetting the outputs if the coincidence signal is generated. The timing points for output of the PWM pulses are different from one another so as to be distributed.