A low voltage switched-capacitor current reference circuit with low dependence on process, voltage and temperature

A low voltage switched-capacitor circuit that generates an almost constant reference current across process, voltage and temperature (PVT) is proposed. The reference voltage is generated by a low voltage band-gap circuit. The output reference current is obtained by applying the generated reference v...

Full description

Saved in:
Bibliographic Details
Published in16th International Conference on VLSI Design, 2003. Proceedings pp. 504 - 506
Main Authors Khan, Q.A., Wadhwa, S.K., Misri, K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Circuit simulation
Clocks
CMOS process
Low voltage
Photonic band gap
Resistors
Switched capacitor circuits
Switching circuits
Switching converters
Temperature dependence
Online AccessGet full text

Cover

More Information
Summary:A low voltage switched-capacitor circuit that generates an almost constant reference current across process, voltage and temperature (PVT) is proposed. The reference voltage is generated by a low voltage band-gap circuit. The output reference current is obtained by applying the generated reference voltage to a low voltage V-I converter. The resistor in the proposed V-I converter is further replaced by a switched capacitor resistor. Due to less variation in the capacitor value across PVT's and high accuracy in integrated voltage reference, the output reference current remains fairly constant. The circuit has been designed in 0.13 /spl mu/m CMOS process at 1.5 V supply voltage. The simulation results show that the output reference current is quite insensitive to PVT and varies linearly with clock frequency and capacitor value of the switched capacitor resistor.
ISBN:0769518680
9780769518688
ISSN:1063-9667
2380-6923
DOI:10.1109/ICVD.2003.1183184