Tunable VCO frequency sensitivity

Details Tunable VCO frequency sensitivity Tunable VCO frequency sensitivity

1990-06-25

1992-01-21

Grimm, Siegfried H.

Oscillators

With distributed parameter resonator

Parallel wire type

331117D, 331177V, H03B 518

Patent

active

050830988

ABSTRACT:
A voltage controlled oscillator having an active network and a tuning network that includes a transmission line impedance transformer having a first end coupled to an output circuit of the VCO, and having a selectable effective width that determines the tuning bandwidth of the oscillator. A varactor diode is coupled to the second end of the transformer line, and a bias line is coupled between a tuning port and the varactor diode. The transmission line impedance transformer more particularly includes a main transformer line, a plurality of transmission lines adjacent the main transformer line, and wire bonds for electrically connecting selected ones of the plurality of lines to the main transformer line, whereby connection of selected ones of the transmission lines to the main transformer line increases the effective width of the impedance transformer.

REFERENCES:
patent: 4639691 (1987-01-01), Iigima
patent: 4660002 (1987-04-01), Iijima et al.

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