Oscillators – With distributed parameter resonator
Patent
1999-02-12
2000-11-07
Kinkead, Arnold
Oscillators
With distributed parameter resonator
331107SL, 331107DP, 331117D, 333205, 333235, H03B 518
Patent
active
061442631
ABSTRACT:
A voltage-controlled oscillator and a method capable of precisely adjusting a frequency shift amount are provided irrespective of a fluctuation in characteristics of elements such as a strip-line. A center tap 19 is formed in a strip-line 16 of a resonator. A switching element 20 is connected to the center tap 19, and this switching element 20 is turned ON, so that the center tap is shortcircuited to the ground so as to vary the oscillating frequency. A slit A1 is conducted in the vicinity of the center tap 19 along the strip-line 16 and directed toward a shortcircuited end 17 of the strip-line, so that a frequency shift amount is adjusted. Also, a slit B1 is conducted in the vicinity of the shortcircuited end 17 along the strip-line 16 and directed toward the center tap 19, so that a frequency shift amount is adjusted. Also, trimming points are provided on the side of a hot terminal 18 from the center tap 19, and also provided on the side of the shortcircuited end 17 from the center tap 19, and further a slit is conducted along an intersecting direction of the strip-line 16, so that a shift amount is adjusted.
REFERENCES:
patent: 4583064 (1986-04-01), Makimoto et al.
patent: 4639691 (1987-01-01), Iigima
patent: 4749963 (1988-06-01), Makimoto et al.
patent: 5852388 (1998-12-01), Nakai et al.
Patent Abstracts of Japan, vol.016, No. 423 (E-1260), Sep. 7, 1992, JP-A-04 145907, May 19, 1992.
Patent Abstracts of Japan, vol. 016, No. 027, ( E-1158), Jan. 23, 1992, JP-A-03 242007, Oct. 29, 1991.
Endo Takeshi
Katsumata Masashi
Kinkead Arnold
TDK Corporation
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