Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PWM GENERATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2017/186104
Kind Code:
A1
Abstract:
A PWM generation circuit. The generation circuit comprises: a constant current source circuit, a sawtooth wave circuit, a comparison circuit and a controllable DC circuit, wherein the constant current source circuit is configured to supply a constant direct current to a capacitor C1 in the sawtooth circuit; the sawtooth circuit is connected to the constant current source circuit, and is configured to control the voltage of the capacitor C1, such that the capacitor C1 outputs a sawtooth output signal; the comparison circuit is connected to the sawtooth wave circuit and the controllable DC power source, respectively, and is configured to receive the sawtooth signal and a DC signal outputted by the controllable DC power source, to compare the sawtooth wave signal with the DC signal, and to output a PWM signal according to the comparison result.

Inventors:
WAN, Li (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
Application Number:
CN2017/081912
Publication Date:
November 02, 2017
Filing Date:
April 25, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ZTE CORPORATION (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
International Classes:
H03K7/08
Foreign References:
CN102307044A2012-01-04
CN101331809A2008-12-24
CN101621288A2010-01-06
CN101984558A2011-03-09
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (F6 Xijin Centre, 39 Lianhuachi East Rd. Haidian District, Beijing 6, 100036, CN)
Download PDF: