Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1990-11-19
1991-09-10
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330261, H03F 345
Patent
active
050477293
ABSTRACT:
A transconductance amplifier is driven by a difference voltage which is coupled through a first input terminal to a first voltage-to-current converter and through a second input terminal to a second voltage-to-current converter of identical design. An identical third voltage-to-current converter has its input terminal connected to the tap of a resistive voltage divider which is connected between the first and second input terminals. The output signal of the transconductance amplifier can be taken from the current outputs of the first and second voltage-to-current converters. The current outputs have a difference current which is proportional to the value of the difference voltage.
REFERENCES:
patent: 4901031 (1990-02-01), Kalthoff et al.
patent: 4951003 (1990-08-01), De Jager et al.
"Tridifferenzverstarker," Radio Fernsehen Electronik, vol. 34, No. 5, May 1985, p. 333.
Mamoru Ohara, et al., "Bipolar Monolithic Amplifiers for a Gigabit Optical Repeater", IEEE Journal of Solid-State Circuits, vol. SC-19, No. 4, Aug. 1984, pp. 491-497.
Deutsche ITT Industries GmbH
Mottola Steven
Peterson Thomas L.
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