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A Linear Temperature-to-Differential-Current Converter
(1979-01-01)
Pookaiyaudom, S.
;
Watanachaiprateep, C.
A simple circuit is proposed as a linear temperature-to-differential current converter. Large and accurate conversion rate can be easily obtained. An immediate application has also been proposed. © 1979 IEEE
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Peak-amplitude detector for sinusoidal signals
(1979-02-15)
Pookaiyaudom, S.
;
Watanachaiprateep, C.
;
Dejhan, K.
A circuit technique is proposed for detecting the peak amplitude of a sinusoidal signal using Pythagoras's law without requiring a simultaneous equal-amplitude quadrature signal. The number of four-quadrant multipliers required is only two.© 1979, The Institution of Electrical Engineers. All rights reserved.
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Transition between a flat magnitude and a sharp cut-off lowpass filter
(1979-01-01)
Thajchayapong, P.
;
Lomtong, P.
A Butterworth lowpass filter provides excellent flatness around ω = 0 but the cut-off rate is low. Recently improvements to the cut-off rate have been made by introducing one ripple near the band edge. This paper offers a generalized design technique such that any degree of trade-offs between flat magnitude around ω = 0 and sharp cut-off at the band edge can be obtained while keeping the ratio of the reflected power to the transmitted power at minimum. © 1979 Taylor and Francis Group, LLC.
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Filter coefficients of high-pass and band-elimination recursive digital filters with a maximally flat group delay
(1979-10-01)
Thajchayapong, P.
;
Cheevasuvit, F.
The design technique for a recursive digital filter with a maximally flat group delay at an arbitrary specified frequency is known. It is shown here that, for certain cases, the filter coefficients for high-pass and band-elimination recursive digital filters with a maximally flat group delay can be expressed in closed forms.
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An Integrable Electronically Variable Phase Shifter
(1979-01-01)
Pookaiyaudom, S.
;
Dejhan, K.
;
Watanachaiprateep, C.
An easily integrable electronically variable phase shifter is proposed and experimentally demonstrated. The circuit operation is in the current mode, and it can be directly employed as a subsystem of monolithic circuit A temperature compensated biasing circuit has also been suggested. Copyright © 1979 by The Institute Of Electrical And Electronics Engineers, Inc.
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Accurate syntheses of non-linear resistances
(1979-01-01)
Pookaiyaudom, S.
;
Surawatpanya, C.
An easily integrable circuit principle is proposed and experimentally demonstrated for the syntheses of a large class of voltage-controlled non-linear resistances. The resulting non-linear resistances are floating, bipolar and require low bias currents. © Taylor and Francis Group, LLC.
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An Alternative Simultaneous Maximally Flat Approximation for a Low-Pass Recursive Digital Filter
(1979-01-01)
Thajchayapong, P.
;
Cheevasuvit, F.
;
Karnchanawadee, P.
Digital filters with either maximally flat magnitude or maximally flat group delay are known [1]–[3]. This paper offers an approach to the design of a recursive digital filter with simultaneous approximation to both magnitude and phase. Although the same Taylor norm is used, this described technique is different from the previous approach [4] in the sense that it employs a power series expansion around ω = 0 in the z-plane. It gives an alternative insight into the problem for the designers who are more familiar with the z-plane than the Richards' λ-plane. The filter transfer functions are obtained explicitly in closed forms. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.
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A recursive digital filter with simultaneous maximally flat magnitude and group delay at an arbitrary specified frequency
(1979-01-01)
Thajchayapong, P.
;
Karnchanawadee, P.
;
Cheevasuvit, F.
A design technique for a recursive digital filter with simultaneously maximally flat magnitude and group delay at an arbitrary specified frequency is presented. It employs the power series expansion to formulate a set of simultaneous linear equations which can be solved with a standard computational algorithm. Copyright © 1979 by Thc Institute of Ekctrical and EkcuPnics Engineers, Inc.
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Switching Phenomena in Reverse-Biased Gold-Diffused Silicon p+-i-n+ Diodes
(1979-01-01)
Supadech, S.
;
Heng, T.
A novel mode of operation for a reverse-biased narrow i-region gold-diffused silicon p<sup>+</sup>-i-n<sup>+</sup> diode exhibiting switching negative resistance is reported. The i-region width is in the range of 12–16 µm, and gold has been used to generate deep trapping levels in the i-region. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.
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A Single-Transistor Full-Wave Rectifier
(1979-01-01)
Pookaiyaudom, S.
;
Watanachaiprateep, C.
;
Dejhan, K.
A simple full-wave rectifier using only a single transistor with two matched resistors has been proposed and the bask performances have been experimentally demonstrated. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.

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