Superconducting low-noise oscillator

Details Superconducting low-noise oscillator Superconducting low-noise oscillator

1991-02-20

1992-06-02

Mis, David

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505854, 331 96, 331107S, 331117D, H03B 500, H03B 518, H01B 1200, H01L 3912

Patent

active

051186608

ABSTRACT:
A low-noise cryogenic oscillator has a resonant circuit formed of superconducting material for generating a signal at a desired frequency. A linear amplifier and a limiter are electrically connected to the resonant circuit at first, second and third locations. A buffer amplifier is electrically connected to the resonant circuit at a fourth location and applies the signal generated by the resonant circuit to a load. The first, second, third and fourth locations are selected to minimize the impedance from those locations to ground at 1/f frequencies. The resonant circuit, the linear amplifier, the limiter and the buffer amplifier are all maintained at a temperature below the critical temperature of the superconducting material.

REFERENCES:
patent: 2704431 (1955-03-01), Steele
patent: 3316499 (1967-04-01), Zinn et al.
patent: 3617924 (1971-11-01), Fujita et al.
patent: 4749963 (1988-06-01), Makimoto et al.
patent: 4797614 (1989-01-01), Nelson
patent: 4901038 (1990-02-01), Dusclaux et al.

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