Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-08-22
1993-08-03
Sikes, William L.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307455, 3072961, 3072966, 307248, H03K 1906
Patent
active
052332349
ABSTRACT:
An emitter follower output circuit includes a first bipolar transistor for outputting a potential from its emitter to an output terminal and a second bipolar transistor, connected in series to the first bipolar transistor, for feeding a current to the first bipolar transistor. A capacitor connected between a collector of the first bipolar transistor and a base of the second bipolar transistor detects a transitional change of a potential at the collector of the first bipolar transistor and controls a potential at the base of the second bipolar transistor. The current flowing into the emitter follower output circuit is made small independently of the potential level of the output terminal in the steady-states, the current is made large transitionally and correspondingly to the degree of the load capacitance so as to discharge the load capacitance rapidly in the falling period of the output signal, and the current is made small transitionally so as to charge the load capacitance rapidly by use of the output transistor, whereby it is possible to provide an emitter follower output circuit which consumes little power and which operates at a high speed.
REFERENCES:
patent: 3781689 (1973-12-01), Marshall et al.
patent: 4331887 (1982-05-01), Jadus et al.
patent: 4623803 (1986-11-01), Thompson et al.
patent: 4672242 (1987-06-01), Teymouri
patent: 4827158 (1989-05-01), Matsumura
patent: 4835455 (1989-05-01), Coddington et al.
patent: 4926065 (1990-05-01), Coy et al.
patent: 5059827 (1991-10-01), Phan et al.
NEC Corporation
Ouellette Scott A.
Sikes William L.
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