Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1989-07-21
1991-10-15
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307494, 307350, 307359, 328146, G06G 712, G06G 714, H03K 5153
Patent
active
050577166
ABSTRACT:
An electronic multiplier circuit in which a first differential amplifier is introduced into the negative feedback of an input amplifier, an input of the first differential amplifier is connected to an input of a second differential amplifier and the collectors of the second differential amplifier are connected to an output amplifier theoretically incorporates the best conditions for an ideal multiplying function. The fact that this is not quite so is caused by the so-called emitter bulk resistance which is present in real transistors. It effects a negative feedback in both differential amplifiers which depends upon the magnitude of the control currents. As a result, the transmission characteristics coincide only when the control currents for both differential amplifiers are equally great. Only then is the functioning of the circuit ideal. The present invention offers a solution whereby, as shown in FIG. 1, a portion of the output voltage (.mu.A) is connected to the second input (D) of the second differential amplifier (D2) and a portion of the input voltage (.mu.E) is connected to the second input (B) of the first differential amplifier (D1) thus creating an ideal multiplier circuit.
REFERENCES:
patent: 4586155 (1986-04-01), Gilbert
patent: 4883987 (1988-05-01), Fattaruso
Semiconductor Circuit Technology, FIG. 4.41, Tietze and Schenk, Springer Verlag Publishers, 6th Edition, p. 67.
Semiconductor Circuit Technology, FIG. 4.44, Tietze and Schenk, Springer Verlag Publishers, 6th Edition, p. 72.
Semiconductor Circuit Technology, FIG. 12.37, Tietze and Schenk.
National Semiconductor Linear Databook 1982, pp. 3-170.
Miller Stanley D.
Phan Trong
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