Effects of the op amp finite gain and bandwidth on the performance of switched-capacitor filters

1981 ◽  
Vol 28 (8) ◽  
pp. 822-829 ◽  
Author(s):  
K. Martin ◽  
A. Sedra
Keyword(s):  
Switched Capacitor ◽  
Op Amp ◽  
Switched Capacitor Filters ◽  
Finite Gain

scholarly journals Effects of Non-Idealities of OP-AMPs on Active Filters: An Analytical Study

1994 ◽  
Vol 17 (3) ◽  
pp. 179-201
Author(s):  
Prem Bhushan Mital ◽  
Umesh Kumar
Keyword(s):  
Analytical Study ◽  
Active Filters ◽  
Switched Capacitor ◽  
Slew Rate ◽  
Gain Bandwidth ◽  
Advantages And Disadvantages ◽  
Op Amps ◽  
Switched Capacitor Filters ◽  
Finite Gain

This paper studies the effect of non-idealities of OP AMPs on the performance of active filters. The non-ideality is considered in terms of finite gain, finite gain-bandwidth product, slew-rate, and offset voltages. The effect of these non-idealities on active RC & switched capacitor filters is highlighted. Some ways of reduction of these effects are also suggested and relative advantages and disadvantages of various compensation techniques are discussed.

Reduction of finite-gain effect in switched-capacitor filters

1985 ◽  
Vol 21 (15) ◽  
pp. 644 ◽  
Author(s):  
K. Nagaraj ◽  
K. Singhal ◽  
T.R. Viswanathan ◽  
J. Vlach
Keyword(s):  
Switched Capacitor ◽  
Switched Capacitor Filters ◽  
Finite Gain

scholarly journals A Novel Offset and Finite-Gain Compensated Switched-Capacitor Amplifier with Input Correlated Level Shifting

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 986
Author(s):  
Yan Chen ◽  
Yousheng Chen ◽  
Yan Guo ◽  
Chunxia Li
Keyword(s):  
Cmos Technology ◽  
Double Sampling ◽  
Switched Capacitor ◽  
Dc Offset ◽  
Op Amp ◽  
Correlated Double Sampling ◽  
Gain Error ◽  
Dc Gain ◽  
Finite Gain ◽  
Correlated Level Shifting

A novel offset and finite-gain compensated differential switched-capacitor(SC) amplifier is presented. Incorporating the correlated double sampling (CDS) technique and input correlated level shifting (CLS) technique together, the DC offset and DC gain error of SC amplifier are further reduced by a factor of op-amp DC gain compared with the conventional offset and finite-gain compensated SC amplifier. The effectiveness of the new scheme has been analyzed and verified by extensive simulations. An SC amplifier with the proposed scheme is designed in 130 nm CMOS technology. Simulated results show that with an op-amp having a low DC gain of 30 dB and an input offset of 10 mV, the proposed SC amplifier achieves an output offset and DC-gain error of 154 µV and 0.05%, respectively, which are significantly improved compared with 1.155 mV and 0.42% achieved in the conventional SC amplifier.

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