Browsing by Author "HSIEH Wei-Chih"

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Charge Pump
(2011-09-15)
WU Chun-Yi
;
HSIEH Wei-Chih
;
CHANG Ming-Hung
;
HWANG Wei
A charge pump is disclosed for amplifying an input voltage received at an input end and outputting the amplified voltage at an output end as an output voltage. The charge pump includes a plurality of source/drain coupling transistors for serving as charging capacitors, and a plurality of cascode-connected transistors being symmetrically connected to between the input end and the output end. The charge pump further includes a plurality of diode-connected transistors to protect the source/drain coupling transistors against breakdown during the course of charge transfer and to speed up the charge transfer.
FULLY-ON-CHIP TEMPERATURE, PROCESS, AND VOLTAGE SENSOR SYSTEM
(2012-03-01)
CHEN Shi-Wen
;
CHANG Ming-Hung
;
HSIEH Wei-Chih
;
HWANG Wei
A fully on-chip temperature, process, and voltage sensor includes a voltage sensor, a process sensor and a temperature sensor. The temperature sensor includes a bias current generator, a ring oscillator, a fixed pulse generator, an AND gate, and a first counter. The bias current generator generates an output current related to temperature according to the operating voltage of chip. The ring oscillator generates an oscillation signal according to the output current. The fixed pulse generator generates a fixed pulse signal. The AND gate is connected to the ring oscillator and the fixed pulse generator for performing a logic AND operation on the oscillation signal and the fixed pulse signal, and generating a temperature sensor signal.