Balanced voltage-current converter and double-balanced mixer cir

Details Balanced voltage-current converter and double-balanced mixer cir Balanced voltage-current converter and double-balanced mixer cir

1988-11-02

1990-06-26

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

307529, 330252, G05F 316

Patent

active

049375164

ABSTRACT:
The collectors of two transistors T.sub.5 and T.sub.6 constitute a first and a second collector terminal to which a load circuit can be connected. The base signal currents of T.sub.5 and T.sub.6 are added to their collector signal currents or subtracted from their emitter signal currents by a first difference pair T.sub.7, T.sub.8 and a second difference pair T.sub.9, T.sub.10. The signal current in the first and the second collector terminal is thus very accurately equal to the input signal current at the emitters of T.sub.5 and T.sub.6. Due to the high voltage gain of the first and the second difference pair, T.sub.5 and T.sub.6 are substantially completely turned on. A double-balanced mixer circuit having a large dynamic range is provided by a load circuit having two cross-coupled differential amplifiers T.sub.1, T.sub.2 and T.sub.3, T.sub.4.

REFERENCES:
patent: Re30572 (1981-04-01), Steckler
patent: 3962592 (1976-06-01), Thommen et al.
patent: 4290025 (1981-09-01), van de Plassche
patent: 4490685 (1984-12-01), Sano
patent: 4513242 (1985-04-01), Yokogawa
patent: 4536717 (1985-08-01), Hauge et al.
patent: 4636663 (1987-01-01), Jongepier et al.
patent: 4682098 (1987-07-01), Seevinck et al.
Turner, "Differential Amplifier Provides AGC Control", Electronic . . . , vol. 12, No. 5, Mar. 2, 1964, p. 3.

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