Tunable low noise oscillator using delay lines and ring mode tra

Details Tunable low noise oscillator using delay lines and ring mode tra Tunable low noise oscillator using delay lines and ring mode tra

1998-01-26

2000-07-18

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 96, 331105, 331117D, 331175, 331 36C, 331177V, 331117FE, H03B 104, H03B 512, H03B 518

Patent

active

060913096

ABSTRACT:
An oscillator comprises an active device with a phase shift of less than 180 degrees. A first delay line has first and second ends. The first end of the first delay line is coupled to an active port of the active device. A ring mode trap filter is coupled to the second end of the first delay line. A second delay line has first and second ends. The first end of the second delay line is coupled to the ring mode trap filter. The second end of the second delay line is coupled to a resonance means. The total delay of the first and second delay lines allows the resonance means to oscillate at its natural frequency in spite of the less-than-180-degree phase shift of the active device.

REFERENCES:
patent: 2451910 (1948-10-01), Bock
patent: 4504801 (1985-03-01), Stut
patent: 4616193 (1986-10-01), Meyer
patent: 4891610 (1990-01-01), Veith
patent: 5834981 (1998-11-01), Trier et al.

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