Very low noise, wide frequency range phase lock loop

Details Very low noise, wide frequency range phase lock loop Very low noise, wide frequency range phase lock loop

1995-05-17

1996-05-07

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 25, 331 34, 331 57, H03B 504, H03L 7099

Patent

active

055150128

ABSTRACT:
A ring-style, multi-stage VCO of a phase lock loop circuit includes two or more differential amplifier stages. The phase lock loop includes a lowpass filter connected between a control voltage terminal and a voltage-to-current converter stage, which includes a first source-follower MOS transistor M1 with a source resistor R1 and a second diode-connected MOS transistor M2 connected to its drain terminal. A differential amplifier stage includes a current-source MOS transistor M10 having a gate terminal connected to the drain of the first MOS transistor M1 to current mirror the drain current of M1. The differential amplifier stage also includes a pair of MOS transistors M4 and M5 connected to the drain terminal of the current-source MOS transistor M10. The gate terminal of MOS transistor M4 is an IN terminal and the gate terminal of MOS transistor M5 is an IN.sub.-- terminal. The drain terminal of MOS transistor M4 provides an OUT.sub.-- signal for the differential amplifier stage and the drain terminal of MOS transistor M5 provides an OUT signal for the differential amplifier stage. A MOS transistor M6 forms a load impedance for MOS transistor M4 and a MOS transistor M7 forms a load impedance for MOS transistor M5. The gate terminals of M6 and M7 are connected to the voltage control input terminal of the phase lock loop.

REFERENCES:
patent: 5285173 (1994-02-01), Reynolds

Affiliated with

Also associated with

Rating

Very low noise, wide frequency range phase lock loop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Very low noise, wide frequency range phase lock loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very low noise, wide frequency range phase lock loop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1229955