A current-mode continuous-time ΣΔ modulator with delayed return-to-zero feedback

2003 ◽  
Author(s):  
H. Aboushady ◽  
E.deL. Mendes ◽  
M. Dessouky ◽  
P. Loumeau
Keyword(s):  
Continuous Time ◽  
Current Mode ◽  
Σδ Modulator ◽  
A Current

A current-mode flash ADC for low-power continuous-time sigma delta modulators

2013 ◽  
Author(s):  
Chang-Joon Park ◽  
Hemasundar Mohan Geddada ◽  
Aydin Ilker Karsilayan ◽  
Jose Silva-Martinez ◽  
Marvin Onabajo
Keyword(s):  
Low Power ◽  
Continuous Time ◽  
Current Mode ◽  
Sigma Delta ◽  
Flash Adc ◽  
Sigma Delta Modulators ◽  
A Current

Design of a current-mode continuous-time Sigma-Delta modulator with exponential feedback for improved jitter rejection

2009 ◽  
Vol 96 (11) ◽  
pp. 1127-1144 ◽  
Author(s):  
L. Quintanilla ◽  
J. Arias ◽  
L. Enríquez ◽  
J. Vicente ◽  
J. Hernández ◽  
...  
Keyword(s):  
Continuous Time ◽  
Current Mode ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
A Current

Synthesis for Butterworth Filter Using Compact VDTA Based on Sallen- Key Topology

2020 ◽  
Vol 13 (5) ◽  
pp. 681-688
Author(s):  
Yong-An Li
Keyword(s):  
Network Theory ◽  
Current Mode ◽  
Second Order ◽  
Frequency Filter ◽  
Butterworth Filter ◽  
Admittance Matrix ◽  
Floating Capacitor ◽  
A Current

Background: The original filter including grounded or virtual ground capacitors can be synthesized by using the NAM expansion. However, so far the filters including floating capacitor, such as Sallen-Key filter, have not been synthesized by means of the NAM expansion. This is a problem to be researched further. Methods: By using the adjoint network theory, the Sallen-Key filter including floating capacitor first is turned into a current-mode one, which includes a grounded capacitor and a virtual ground capacitor. Then the node admittance matrix, after derived, is extended by using NAM expansion. Results: At last, one VDTA Sallen-Key filter is received. It employs single compact VDTA and two grounded capacitors. Conclusion: A Butterworth VDTA second-order frequency filter based on Sallen-Key topology with fo = 100kHz, HLP = -HBP=1, is designed.

CDBA based current instrumentation amplifier

2016 ◽  
Vol 4 ◽  
pp. 11 ◽  
Author(s):  
Priyanka Gupta ◽  
Kunal Gupta ◽  
Neeta Pandey ◽  
Rajeshwari Pandey
Keyword(s):  
Current Mode ◽  
Instrumentation Amplifier ◽  
Pspice Simulations ◽  
Differential Gain ◽  
Novel Method ◽  
Current Difference ◽  
A Current

This paper presents a novel method to realize a current mode instrumentation amplifier (CMIA) through CDBA (Current difference Buffered Amplifier). It employs two CDBAs and two resistors to obtain desired functionality. Further, it does not require any resistor matching. The gain can be set according to the resistor values. It offers high differential gain and a bandwidth, which is independent of gain. The working of the circuit is verified through PSPICE simulations using CFOA IC based CDBA realization.

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