Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Patent
1998-01-26
2000-09-26
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
327116, H03B 1900
Patent
active
061247421
ABSTRACT:
A wide bandwidth frequency multiplier (48) multiplies a first frequency of an input signal (52) to generate an output signal (54) having a second frequency. The multiplier (48) includes first stage doubler (56). The doubler (56) includes a lumped element power splitter (62), a push-push amplifier (80), and a combining junction (96). The power splitter (62) splits the input signal (52) into first and second signals (70, 72) that are balanced in phase. A series resistive element (86) maintains amplitude balance between the first and second signals (70, 72). First and second feedback circuits (166, 184) are integrated with first and second transistors (164, 182) so that the push-push amplifier (80) operates over wide bandwidth. In addition, the multiplier (48) includes a second stage doubler (58) configured similar to the first stage doubler (56) for producing an output signal (54) that is quadruple the frequency of input signal (52). The first and second stage doublers (56, 58) are combined on a single integrated circuit.
REFERENCES:
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patent: 4749950 (1988-06-01), Farkas
patent: 5563612 (1996-10-01), Flood et al.
A balanced millimeter wave doubler based on pseudomorphic HEMTS. Authors--I. Angelov, H. Zirath, N. Rorsman, H. Gronqvist. Chalmers University of Technology, S-41296 Gotteborg, Sweden. 1992 IEEE MTT-S Digest.
180.degree. Lumped Element Hybrid. Author--Samuel J. Parisi, The MITRE Corporation. Bedford, Massachusetts. 1992 IEEE MTT-S Digest.
Cook Dean
Grondahl Christopher D.
Gorrie Gregory J.
Motorola Inc.
Wells Kenneth B.
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