Title:
SEMICONDUCTOR WAVEFORM GENERATOR
Document Type and Number:
WIPO Patent Application WO/2012/157801
Kind Code:
A1
Abstract:
The present invention relates to a semiconductor waveform generator, comprising: a reference signal generation unit for generating a reference voltage (VREF), and generating an upper threshold value (VFB) and a lower threshold value (VTHL) of a sawtooth wave by dividing the reference voltage (VREF); a charge / discharge control unit for generating a reference current by receiving the reference voltage (VREF) which is generated by the reference signal generation unit and inputted through a bias, and for controlling the charging / discharging of a sawtooth wave generation capacitor to generate the sawtooth wave, based on charge / discharge enabling signals (ENP) (ENN), which are feed backed by copying the reference voltage using a current mirror; and a sawtooth wave amplitude control unit for comparing a sawtooth output signal from the charge / discharge control unit with each of the upper threshold value (VFB) and the lower threshold value (VTHL) from the reference signal generation unit, controlling a resetting (R) and a setting (S) of a latch, thereby generating and outputting via the latch a square wave having an amplitude which is controlled according to the controlling of the upper and lower thresholds of the sawtooth wave, and feeding back the square wave as the charge / discharge enabling signals of the charge / discharge control unit.
Inventors:
CHANG KEE SEOK (KR)
Application Number:
PCT/KR2011/003738
Publication Date:
November 22, 2012
Filing Date:
May 20, 2011
Export Citation:
Assignee:
TAEJIN TECHNOLOGY CO LTD (KR)
CHANG KEE SEOK (KR)
CHANG KEE SEOK (KR)
International Classes:
H03K4/12; G05F1/10
Foreign References:
| KR20100111343A | 2010-10-15 | |||
| JP2007074190A | 2007-03-22 | |||
| JP2010268408A | 2010-11-25 | |||
| JP2007116685A | 2007-05-10 |
Attorney, Agent or Firm:
JEONG, Hwoi Hwan (KR)
정회환 (KR)
정회환 (KR)
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Claims: