Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-01-27
1985-05-07
Anagnos, Larry N.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, H03K 19086, H03K 19013
Patent
active
045160392
ABSTRACT:
A logic circuit (FIGS. 4A, 5A and 6A) comprises a current switch circuit (FIG. 4A) which has a non-threshold transfer characteristic (FIG. 4B), operates in non-saturation region, and is suited to a high speed operation.
The current switch circuit is formed by a pair of transistors (6 or 7, and 8), one of which (6 or 7) receives an input signal at its base, and the other (8) has its base and collector connected in d.c. coupling to each other. The pair of transistors are connected with a common constant current source (9) at their emitters, deliver an output from their collectors, and are so biased as to operate in the non-saturation region.
In the current switch circuit, due to the d.c. coupling between the base and the collector of the other transistor (8), the voltage level of the collector changes linearly in accordance with the input signal of the current switch circuit. This allows for a transfer characteristic having no threshold and a very small delay time between the input signal and the output signal. Moreover, the operation of transistors in the non-saturation region makes possible a logical operation which is high in speed and short in delay time.
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Matsumoto Takashi
Matsuzaki Isokazu
Watanabe Yutaka
Yabe Katsumi
Yamagiwa Akira
Anagnos Larry N.
Hitachi , Ltd.
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