Oscillators – Solid state active element oscillator – Transistors
Patent
1978-02-27
1980-03-25
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331177V, 332 26, 332 30V, H03B 536, H03C 322
Patent
active
041952685
ABSTRACT:
In a high frequency oscillator circuit, or other high frequency circuit, utilizing a crystal, the physical capacitance C.sub.o, of the crystal may be neutralized and the impedance match of the crystal to the remaining circuit achieved over a range of variations in the crystal and varacter parameters by connecting two inductance coils as an auto transformer and disposing them in end to end relationship on a common form across the crystal with a movable metallic slug interiorly thereof for varying the reactance of one coil relative to the other to achieve the desired deviation to reactance response. The overall reactance of the auto transformer remains constant and thus the C.sub.o compensation is not altered.
REFERENCES:
patent: 3223953 (1965-12-01), Pawlowski
patent: 3299356 (1967-01-01), Bornhorst et al.
patent: 3367816 (1968-02-01), Mills et al.
patent: 3457529 (1969-07-01), Merdian, Jr.
patent: 4001724 (1977-01-01), Keller
patent: 4038595 (1977-07-01), Wachter
Electronics, Smith, pp. 76-77, Nov. 13, 1959.
Radio Communication, Lean, pp. 614-619, Aug. 1975.
P. Wireless, Dowdeswell, pp. 41-43, May, 1972, vol. 48, No. 1.
Gillman James W.
Grimm Siegfried H.
Motorola Inc.
Pristelski James S.
Roney Edward M.
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