Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-10-05
1993-01-26
Sikes, William L.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
3072961, 307491, 361 92, H03K 301
Patent
active
051824701
ABSTRACT:
An output stage with a protection circuit against negative overvoltage at its output terminal, having a transistor with collector output and with the emitter connected to a reference voltage line; a diode for protection against negative overvoltages present on the output is arranged between the collector and the output of the stage. In order to give the output of the stage a presettable minimum voltage level, the reference voltage line is set to a preset voltage which differs from the ground voltage. For this purpose, the circuit comprises an operational amplifier in a voltage-follower configuration, the output whereof is connected to the reference voltage line, a diode which is connected between the ground and the non-inverting terminal of the operational amplifier, and a current source which is connected between the non-inverting input of the operational amplifier and a negative supply line.
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IEEE Standard Dictionary of Electrical and Electronic Terms; Jul. 20, 1984; pp. 615+984.
Gariboldi Roberto
Gola Alberto
Cunningham Terry D.
Josif Albert
Modiano Guido
SGS--Thomson Microelectronics S.r.l.
Sikes William L.
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