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How do you increase the input impedance of a differential amplifier? 

Input impedance
Output impedance
Operational transconductance amplifier
Instrumentation amplifier
Amplifier

Answers from top 10 papers

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Papers (10)Insight
Journal Article•DOI
On inductor simulation using a unity-gain amplifier
S.C.D. Roy, V. Nagarajan 
01 Jun 1970-IEEE Journal of Solid-state Circuits
19 Citations
It is shown that the inductance parameters are very sensitive to amplifier gain; this can be remedied by using a high-gain differential-input operational amplifier.
Open access•Journal Article•DOI
Wireless Josephson amplifier
Anirudh Narla, Katrina Sliwa, Michael Hatridge, Shyam Shankar, Luigi Frunzio, Robert Schoelkopf, Michel Devoret 
12 Jun 2014-Applied Physics Letters
25 Citations
The simpler impedance environment presented to the amplifier also results in increased amplifier tunability.
Proceedings Article•DOI
Low input impedance current comparator using in pulse-width modulation
Chun Wei Lin, Sheng Feng Lin 
17 Dec 2010
9 Citations
The further use of a common-source feedback structure also enables extremely reduction of the input impedance.
Open access•Journal Article•DOI
Evolutional design of small antennas for passive UHF-band RFID
Hidetoshi Makimura, Yuta Watanabe, Kota Watanabe, Hajime Igarashi 
09 May 2010
15 Citations
The optimization results in desirable input impedance for impedance matching and miniaturizing.
Journal Article•DOI
Feedback Biasing in Nanoscale CMOS Technologies
Tajeshwar Singh, Trond Sæther, Trond Ytterdal 
01 May 2009-IEEE Transactions on Circuits and Systems Ii-express Briefs
13 Citations
The proposed feedback biasing is also suitable for amplifying signals from high-impedance sources that pose challenges on maintaining high input impedance for the voltage amplifiers while maintaining a very low input capacitance value.
Proceedings Article•DOI
Concept of transformer-feedback degeneration of low-noise amplifiers
Aleksandar Miodrag Tasic, Wouter A. Serdijn, John R. Long 
25 May 2003
7 Citations
Moreover, to cancel the imaginary part of the input impedance, a particular excess inductance is necessary at the input of the amplifier, directly degrading the over-all amplifier performance.
Open access•Proceedings Article•DOI
An electronically controllable instrumentation amplifier based on CCCCTAs
Chaiyan Chanapromma, C. Tanaphatsiri, Montree Siripruchyanun 
27 Mar 2009
12 Citations
The circuit provides high input impedance which is a desirable feature for instrumentation amplifier.
Journal Article•DOI
Functioning of catfish electroreceptors : input impedance and stimulus efficiency
Franklin Bretschneider, J. Verwey, P. Heuts 
01 Jan 1991-Comparative Biochemistry and Physiology Part A: Physiology
10 Citations
In this way, the effective input impedance may be ‘bootstrapped’ to arbitrarily high values.
Journal Article•DOI
Wide-band low-input-impedance trans-impedance amplifiers for instrumentation applications
P L Yu, C Y Zhang, R B Zmood 
01 Nov 1997-Measurement Science and Technology
8 Citations
The effect of stray capacitances can be minimized when using this type of amplifier by ensuring that its input impedance is small.
Proceedings Article•DOI
Output impedance requirements for DACs
S. Luschas, Hae-Seung Lee 
25 May 2003
81 Citations
It is shown that the output impedance required in a fully-differential implementation is much lower than that required in a single-ended one.

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