Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-02-21
1992-10-13
Mullins, James B.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
323317, 341135, 341136, 341144, H03M 166, G05F 316
Patent
active
051553856
ABSTRACT:
A semiconductor integrated circuit device includes a bias generating circuit having an operational amplifier connected to receive an input voltage at its inverting input terminal to produce a gate voltage. A field transistor has its gate connected to receive the gate voltage from the operational amplifier and its drain connected to a resistor and to an noninverting input terminal of the operational amplifer. A field effect transistor has its gate connected to receive the gate voltage from the operational amplifier to produce a current corresponding to the input voltage. One group of current source is responsive to an output voltage of the bias generating circuit to produce a plurality of currents of an equal magnitude and one switching circuit is responsive to an input digital value to selectively output the currents from the group of current sources to its common output.
REFERENCES:
patent: 4766415 (1988-08-01), Dielacher
patent: 4814688 (1989-03-01), Colles
patent: 4827260 (1989-05-01), Sugawa
patent: 4864215 (1989-09-01), Schouwenaars et al.
Gotoh Kunihiko
Sekido Yuuji
Fujitsu Limited
Fujitsu VLSI Limited
Mullins James B.
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