Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Patent
1996-08-13
1997-06-17
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
327356, 330252, G06F 744
Patent
active
056401213
ABSTRACT:
A tripler for multiplying three input signals operable at a low power source voltage such as 3 V or less, which contains a first emitter-coupled pair of first and second bipolar transistors, a second emitter-coupled pair of third and fourth bipolar transistors, and a multiplier. Collectors of the first and third transistors are coupled together and those of the second and fourth transistors are coupled together. A tripler output is derived from the collectors coupled to the first and third transistors and those of the second and fourth transistors. Bases of the first and fourth transistors are coupled together and those of the second and third transistors are coupled together. A first input voltage is applied across the bases coupled of the first and fourth transistors and those of the second and third transistors. The multiplier has a second pair of input ends to be applied with a second input voltage, a third pair of input ends to be applied with a third input voltage, and a pair of output ends from which a differential output current of the multiplier is derived. The first and second emitter-coupled pairs are driven by the differential output current of the multiplier.
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By K. Kimura, "A Unified Analysis of Four-Quadrant Analog Multipliers Consisting of Emitter and Source-Coupled Transistors Operable on Low Supply Voltage", IEICE Trans. Electron, May 1993, vol. E76-C, No. 5, pp. 714-737.
By K. Kimura, "A Bipolar Four-Quadrant Analog Quarter-Square Multiplier Consisting of Unbalanced Emitter-Coupled Pairs and Expansions of Its Input Ranges", IEEE Journal of Solid-State Circuits, Jan. 1994, vol. 29, No. 1, pp. 46-55.
By K. Kimura, "Some Circuit Design Techniques Using Two Cross-Coupled, Emitter-Coupled Pairs", IEEE Transactions on Circuits and Systems, May 1994, vol. 41, No. 5, pp. 410-423.
Callahan Timothy P.
NEC Corporation
Wells Kenneth B.
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