Switched-capacitor filters driven with very low voltage clock signals

1993 ◽  
Vol 29 (24) ◽  
pp. 2092 ◽  
Author(s):  
M. Steyaert ◽  
J. Crols
Keyword(s):  
Low Voltage ◽  
Switched Capacitor ◽  
Switched Capacitor Filters

Design of Low-Voltage MOSFET-Only Switched-Capacitor Filters

2006 ◽  
Author(s):  
R. Ghasemi ◽  
H. Charkhkar ◽  
A. As-adi ◽  
R. Lotfi ◽  
K. Mafinejad
Keyword(s):  
Low Voltage ◽  
Switched Capacitor ◽  
Switched Capacitor Filters

scholarly journals Open-Loop Switched-Capacitor Integrator for Low Voltage Applications

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 762
Author(s):  
Stefano D’Amico ◽  
Stefano Marinaci ◽  
Peter Pridnig ◽  
Marco Bresciani
Keyword(s):  
Figure Of Merit ◽  
Low Voltage ◽  
Power Saving ◽  
Input Voltage ◽  
Open Loop ◽  
Switched Capacitor ◽  
Clock Period ◽  
Output Capacitor ◽  
A Charge ◽  
Switched Capacitor Filters

An architecture of a switched-capacitor integrator that includes a charge buffer operating in an open-loop is hereby proposed. As for the switched-capacitor filters, the gain of the proposed integrator, which is given by the input/output capacitor ratio, ensures desensitization to process, voltage, and temperature variations. The proposed circuit is suitable for low voltage supplies. It enables a significant power saving compared to a traditional switched-capacitor integrator. This was demonstrated through an analytical comparison between the proposed integrator and a traditional switched-capacitor integrator. The mathematical results were supported and verified by simulations performed on a circuit prototype designed in 16 nm finFET technology with 0.95 V supply. The proposed switched-capacitor integrator consumes 76 µW, resulting in more than twice the efficiency for the traditional closed-loop switched-capacitor filter as an input voltage equal to 31.25 mV at 7 ns clock period is considered. The comparison of architectures was led among the proposed integrator and the state-of-the-art technology in terms of the figure of merit.

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