Wide-Input Range Variable Resistor Circuit Using an FG-MOSFET

Muneo KUSHIMA  Koichi TANNO  Okihiko ISHIZUKA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E86-A   No.12   pp.3294-3296
Publication Date: 2003/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Analog Signal Processing
Keyword: 
analog integrated circuits,  floating-gate MOSFET (FG-MOSFET),  variable resistor circuit,  wide-input range,  

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Summary: 
In this letter, a linear variable resistor circuit using an FG-MOSFET (floating-gate MOSFET) is proposed. This is based on Schlarmann's variable resistor and is very simple. The advantage of the proposed circuit is a wide-input range. The utility of the proposed circuit was confirmed by HSPICE simulation with 1.2 µm CMOS process parameters. The simulation results are reported in this letter.