Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Patent
1994-10-21
1996-05-28
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
327355, 327356, 327105, 327113, 327116, 455330, 455326, H04B 128, G06G 702
Patent
active
055215459
ABSTRACT:
A collector-injector mixer circuit (100) has a first differential pair of transistors having first and second transistors (102, 104) whose emitters are connected to a common first emitter terminal (110), and a second differential pair of transistors having third and fourth transistors (106, 108) whose emitters are connected to a common second emitter terminal (112). The bases of the first and fourth transistors (102, 108) are coupled to a common first base terminal (114) and the bases of the second and third transistors (104, 106) are coupled to a common second base terminal (116) between which a mixing signal is applied. A third differential pair of transistors have fifth and sixth transistors (124, 126) wherein collector (130, 132) of the fifth transistor (124) and sixth transistor (126) receive an input signal, an emitter of the fifth and sixth transistors (124, 126) are coupled through resistors (146, 148) to ground, and bases of the fifth and sixth transistors are coupled to a reference current circuit (150).
REFERENCES:
patent: 4344188 (1982-08-01), Tanabe et al.
patent: 4480337 (1984-10-01), Graziadei et al.
patent: 4636663 (1987-01-01), Jongepier et al.
patent: 5379457 (1995-01-01), Nguyen
Tan Wei
Terry Brian K.
Callahan Timothy P.
Gardner Kelly A.
Le Dinh J.
Motorola Inc.
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