DocumentCode :
954440
Title :
A Solid-State Variable Resistor Using a Junction FET
Author :
Sugita, Etsuji ; Yasuda, Toyoshi ; Matsumoto, Tadashi
Author_Institution :
N.T.T.,Physical Design Sec.,Electronic Equipment Development Division,Tokyo
Volume :
12
Issue :
3
fYear :
1976
fDate :
9/1/1976 12:00:00 AM
Firstpage :
260
Lastpage :
264
Abstract :
A noncontact variable resistor having fast response and small nonlinear distortion is needed for applications such as autoattenuators or autoequalizers. For these purposes, the voltage controlled variable resistor (VCR) based on the junction FET was investigated. This paper describes the-design results achieved by a VCR and also discusses the behavior of this device with regard to nonlinear distortion and aging characteristics. S/D2 and S/D3 (S: signal level; D2 , D3 : second and third harmonics level) were over 70 dB in the resistance region of 40-600 
and were improved by 10-30 dB, compared with the conventional FET. Resistance aging is less than 1 percent at 100°C after 1000 h.
and were improved by 10-30 dB, compared with the conventional FET. Resistance aging is less than 1 percent at 100°C after 1000 h.Keywords :
FET devices; JFETs; Resistors; Aging; Capacitance; Electric variables control; Equations; FETs; Nonlinear distortion; Resistors; Solid state circuits; Video recording; Voltage control;
fLanguage :
English
Journal_Title :
Parts, Hybrids, and Packaging, IEEE Transactions on
Publisher :
ieee
ISSN :
0361-1000
Type :
jour
DOI :
10.1109/TPHP.1976.1135131
Filename :
1135131
Link To Document :
