A Dynamic Bias Current Technique for a Bipolar Exponential–Law Element and a CMOS Square–Law Element Usable with Low Supply Voltage

Katsuji KIMURA

A Dynamic Bias Current Technique for a Bipolar Exponential–Law Element and a CMOS Square–Law Element Usable with Low Supply Voltage

Katsuji KIMURA

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An emitter–coupled pair with a dynamic bias current and a source–coupled pair with a dynamic bias current are proposed as an exponential–law element and a square–law element that operate as a floating bipolar junction transistor (BJT) and a floating MOS field–effect transistor (MOSFET). In bipolar technology, a hyperbolic sine function circuit and a hyperbolic cosine function circuit are easily obtained by subtracting and summing the output currents of two symmetrical exponential–law elements with positive and negative input signals. In the same manner, an operational transconductance amplifier (OTA) and a squaring circuit are obtained by subtracting and summing the output currents of two symmetrical square-law elements with positive and negative input signals in CMOS technology. The proposed OTA and squaring circuit possess the widest input voltage range ever reported.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E77-A No.11 pp.1922-1928

Publication Date: 1994/11/25

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Type of Manuscript: Special Section LETTER (Special Section of Letters Selected from the 1994 IEICE Spring Conference)

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Katsuji KIMURA, "A Dynamic Bias Current Technique for a Bipolar Exponential–Law Element and a CMOS Square–Law Element Usable with Low Supply Voltage" in IEICE TRANSACTIONS on Fundamentals, vol. E77-A, no. 11, pp. 1922-1928, November 1994, doi: .
Abstract: An emitter–coupled pair with a dynamic bias current and a source–coupled pair with a dynamic bias current are proposed as an exponential–law element and a square–law element that operate as a floating bipolar junction transistor (BJT) and a floating MOS field–effect transistor (MOSFET). In bipolar technology, a hyperbolic sine function circuit and a hyperbolic cosine function circuit are easily obtained by subtracting and summing the output currents of two symmetrical exponential–law elements with positive and negative input signals. In the same manner, an operational transconductance amplifier (OTA) and a squaring circuit are obtained by subtracting and summing the output currents of two symmetrical square-law elements with positive and negative input signals in CMOS technology. The proposed OTA and squaring circuit possess the widest input voltage range ever reported.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/e77-a_11_1922/_p

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@ARTICLE{e77-a_11_1922,
author={Katsuji KIMURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Dynamic Bias Current Technique for a Bipolar Exponential–Law Element and a CMOS Square–Law Element Usable with Low Supply Voltage},
year={1994},
volume={E77-A},
number={11},
pages={1922-1928},
abstract={An emitter–coupled pair with a dynamic bias current and a source–coupled pair with a dynamic bias current are proposed as an exponential–law element and a square–law element that operate as a floating bipolar junction transistor (BJT) and a floating MOS field–effect transistor (MOSFET). In bipolar technology, a hyperbolic sine function circuit and a hyperbolic cosine function circuit are easily obtained by subtracting and summing the output currents of two symmetrical exponential–law elements with positive and negative input signals. In the same manner, an operational transconductance amplifier (OTA) and a squaring circuit are obtained by subtracting and summing the output currents of two symmetrical square-law elements with positive and negative input signals in CMOS technology. The proposed OTA and squaring circuit possess the widest input voltage range ever reported.},
keywords={},
doi={},
ISSN={},
month={November},}

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TY - JOUR
TI - A Dynamic Bias Current Technique for a Bipolar Exponential–Law Element and a CMOS Square–Law Element Usable with Low Supply Voltage
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1922
EP - 1928
AU - Katsuji KIMURA
PY - 1994
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E77-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 1994
AB - An emitter–coupled pair with a dynamic bias current and a source–coupled pair with a dynamic bias current are proposed as an exponential–law element and a square–law element that operate as a floating bipolar junction transistor (BJT) and a floating MOS field–effect transistor (MOSFET). In bipolar technology, a hyperbolic sine function circuit and a hyperbolic cosine function circuit are easily obtained by subtracting and summing the output currents of two symmetrical exponential–law elements with positive and negative input signals. In the same manner, an operational transconductance amplifier (OTA) and a squaring circuit are obtained by subtracting and summing the output currents of two symmetrical square-law elements with positive and negative input signals in CMOS technology. The proposed OTA and squaring circuit possess the widest input voltage range ever reported.
ER -