Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-12-27
1985-08-20
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, 307455, H03K 19092, H03K 19086, H03K 19003, H03K 333
Patent
active
045366659
ABSTRACT:
A circuit for converting ECL logical signals into TTL logical signals comprises a differential amplifier defining two current paths leading to a negative reference potential source. When the ECL input signal is logical zero, the first current path is closed and the second current path is open, and vice versa when the input signal is logical one. A first transistor has its base connected to the first current path and its emitter connected to a positive reference potential source, and is biased by a load resistor connected to the first current path. A second transistor has its emitter connected to the collector of the first transistor and its base connected to the second current path, and is biased by a second resistor. When the input ECL signal is logical one, the first current path is open and the first and second transistors are on and off respectively, the potential at the output terminal of the circuit being limited by a clamping diode connected between the base and collector of the first transistor. When the input ECL signal is logical zero, the first transistor is non-conductive and the second transistor behaves as an emitter follower, and the potential at the output terminal is close to ground.
REFERENCES:
patent: 3173023 (1961-07-01), Talsoe
patent: 3909637 (1975-09-01), Dorler
patent: 4355245 (1982-10-01), Isogai
patent: 4359689 (1982-11-01), Guenthner
Bertelson David R.
Miller Stanley D.
Smith-Hill John
The Grass Valley Group Inc.
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