Filter network for phase-locked loop circuit

Details Filter network for phase-locked loop circuit Filter network for phase-locked loop circuit

1995-03-20

1996-04-02

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 34, 331177R, 327156, H03L 7093

Patent

active

055044590

ABSTRACT:
A filter network is presented for a phase-locked loop (PLL) circuit having a voltage controlled oscillator (VCO) with a control input and a bias input. The filter network includes a conventional filter circuit that provides a "pole" and a "zero" to the transfer function of the PLL circuit. The conventional filter circuit is coupled between the control input of the VCO and ground. An additional filter circuit is also coupled to the control input of the VCO, and to a bias input of the VCO. This additional filter circuit provides at least one additional "zero" to the PLL transfer function to extend the frequency range of the PLL circuit without impairing circuit stability. A transconductance amplifier is preferably employed within the additional filter circuit to facilitate tailoring of the open loop gain of the filter/oscillator circuitry.

REFERENCES:
patent: 3445756 (1969-05-01), Rooney, Jr.
patent: 3667031 (1972-05-01), Cox, Jr. et al.
patent: 3893039 (1975-07-01), Yang et al.
patent: 3993958 (1976-11-01), Cutsogeorge
patent: 4336505 (1982-06-01), Meyer
patent: 4829258 (1989-05-01), Volk et al.
patent: 4855689 (1989-08-01), Kinkel
patent: 4987387 (1991-01-01), Kennedy et al.
patent: 5057705 (1991-10-01), Uchikoshi
patent: 5072196 (1991-12-01), Rousselet et al.
patent: 5075643 (1991-12-01), Einbinder
patent: 5097228 (1992-03-01), McJunkin
patent: 5103352 (1992-04-01), Moon et al.
patent: 5175884 (1992-12-01), Suarez
patent: 5254955 (1993-10-01), Saeki et al.
patent: 5272452 (1993-12-01), Adachi et al.
patent: 5302919 (1994-04-01), Abe
patent: 5334953 (1994-08-01), Mijuskovic
patent: 5359298 (1994-10-01), Abe
patent: 5369376 (1994-11-01), Leblebicioglu
patent: 5382922 (1995-01-01), Gersbach et al.
patent: 5399994 (1995-03-01), Siniscalchi et al.

Affiliated with

Also associated with

Rating

Filter network for phase-locked loop circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Filter network for phase-locked loop circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter network for phase-locked loop circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2019204