Oscillators – With frequency adjusting means – Variable inductance device
Patent
1998-08-19
2000-09-19
Mis, David
Oscillators
With frequency adjusting means
Variable inductance device
331117FE, 331179, 331 45, 334 11, 334 61, H03B 512, H03J 500
Patent
active
061218502
ABSTRACT:
A digitally adjustable inductive element which can be implemented in an integrated circuit. The digitally adjustable inductive element can include a first inductor, and a digital inductance controller operatively coupled to the first inductor which can be utilized to vary the effective inductance of the first inductor. The digitally adjustable inductive element can include a second inductor operatively coupled to the first inductor, and a digital current controller operatively coupled to the second inductor. The digital current controller can include a number of transistors operatively coupled to the second inductor. The digitally adjustable inductive element can be utilized to create a tunable oscillator. The tunable oscillator can include a first inductor, a digital inductance controller operatively coupled to the first inductor which can be utilized to vary the effective inductance of the first inductor, and an oscillator circuit which generates an oscillating signal utilizing the effective inductance of the first inductor. The tunable oscillator can include a second inductor operatively coupled to the first inductor, and a digital current controller operatively coupled to the second inductor. The digital current controller can include a number of transistors operatively coupled to the second inductor.
REFERENCES:
patent: 2994864 (1961-08-01), Van Allen
patent: 3155922 (1964-11-01), Hackett
patent: 3263184 (1966-07-01), French et al.
patent: 3760301 (1973-09-01), Goransson et al.
patent: 5912596 (1999-06-01), Ghoshal
patent: 5994985 (1999-11-01), Pehlke et al.
Electronics, "Inductor Control Gives AFC", Electronics, Feb. 1954, p. 972.
International Business Machines - Corporation
Mis David
Salys Casimer K.
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