Browsing by Author "Hung Chung-Chih"

Now showing 1 - 4 of 4

CURRENT-MODE DUAL-SLOPE TEMPERATURE-DIGITAL CONVERSION DEVICE
(2011-12-01)
LIN Ming-Tse
;
Hung Chung-Chih
A current mode dual-slope temperature-to-digital conversion device is disclosed. The conversion device comprises a temperature dependent current source and a reference current source. Firstly, a capacitor is charged by the temperature dependent current source. Next, the capacitor is discharged by the reference current source. The capacitor is coupled to at least one trigger, and the trigger sends out a first digital signal to a logic controller by the voltage of the capacitor. Then, the logic controller sends out a second digital signal to a time-to-digital converter according to the first digital signal. When the capacitor is discharged by the reference current source and before the first digital signal is varied, the converter receives the second digital signal and a clock signal to generate a corresponding digital output value. The present invention achieves the requirement of the high linearity resolution with the dual-slope architecture lest the curvature effect resulted from the time-domain circuit be occurred.
Current-mode dual-slope temperature-digital conversion device
(2012-03-27)
Lin Ming-Tse
;
Hung Chung-Chih
A current mode dual-slope temperature-to-digital conversion device is disclosed. The conversion device comprises a temperature dependent current source and a reference current source. Firstly, a capacitor is charged by the temperature dependent current source. Next, the capacitor is discharged by the reference current source. The capacitor is coupled to at least one trigger, and the trigger sends out a first digital signal to a logic controller by the voltage of the capacitor. Then, the logic controller sends out a second digital signal to a time-to-digital converter according to the first digital signal. When the capacitor is discharged by the reference current source and before the first digital signal is varied, the converter receives the second digital signal and a clock signal to generate a corresponding digital output value. The present invention achieves the requirement of the high linearity resolution with the dual-slope architecture lest the curvature effect resulted from the time-domain circuit be occurred.
Digital-to-analog conversion device
(2013-04-23)
Chou Fang-Ding
;
Hung Chung-Chih
A digital-to-analog conversion device is disclosed. The digital-to-analog conversion device comprises a variable delay buffer circuit and a plurality of synchronization circuits. The buffer circuit receives a digital signal with a plurality of bits and sequentially outputs a plurality of first complementary digital signal sets delayed according to the order of from MSB to LSB. Each synchronization circuit receives the first complementary digital signal set and a clock signal, uses the clock signal as the timing reference of the first complementary digital signal set, and outputs a second complementary digital signal set corresponding to the first complementary digital signal set to a digital-to-analog conversion unit, so as to convert the second complementary digital signal sets into an analog signal. The present invention uses the delays respectively corresponding to different input bits to control the timing of current switches, whereby the transient glitches are reduced.
Digital-to-analog converter
(2012-08-14)
Hsieh Wen-Hung
;
Hung Chung-Chih
The present invention relates to a digital-to-analog converter comprising a differentiation circuit, a conversion circuit, and an integration circuit. The differentiation circuit receives and differentiates a digital signal for producing a differentiation signal. The conversion circuit is coupled to the differentiation circuit. It receives the differentiation signal and produces a conversion signal according to a clock signal and the differentiation signal. The integration circuit is coupled to the conversion circuit. It receives and integrates the conversion signal for producing an analog signal. Thereby, the purpose of reducing distortion noises can be achieved.