Frequency control and stabilization means and frequency discriminator

Claim 2

A frequency control and stabilization system comprising: a. a tunable signal supply means for supplying a first signal at a frequency and at a power output level; b. frequency filter means adjusted to said frequency and responsive to the frequency and power output level of said signal supply means for generating a first comparison signal having a magnitude that is a function of the frequency and power output level of said first signal; c. means responsive to the power output level of said first signal for generating a second comparison signal having a magnitude which is a function of the said power output level; and d. circuit means for subtracting said comparison signals for developing a tuning signal, said tuning signal being coupled to said signal supply means for tuning said signal supply means to said frequency.

Claim 3

A frequency control and stabilization system as described in claim 1 wherein said signal supply means is tunable over a range of frequencies, said frequency filter means includes input means responsive to a control signal for tuning said frequency filter means to a predetermined frequency.

Claim 4

A frequency control and stabilization system as described in claim 2 wherein the signal supply means is tunable by means of a voltage adjustment and said tuning signal is a voltage having a magnitude which is a function of the frequency difference bEtween the signal supply means and said frequency filter means.

Claim 5

A frequency control and stabilization system as described in claim 1 wherein the magnitude of said second comparison signal is proportional to power level of said first comparison signal.

Claim 6

A frequency control and stabilization system comprising: a. a tunable signal supply means for providing an input signal having a frequency and a power output level; b. a frequency filter circuit coupled to said signal supply means for providing a first comparison signal having a magnitude which is a function of the frequency and power output level of said input signal; c. means responsive to said input signal to provide a second comparison signal having an amplitude which is a function of the power output level of said input signal; and d. means for subtracting the magnitudes of said first and second comparison signals, and amplifying said difference signal to provide a tuning signal for tuning said signal supply means.

Claim 7

A frequency control and stabilization system comprising: a. a tunable signal supply means for providing an input signal having a frequency and a power output level; b. a frequency filter circuit coupled to said signal supply means for providing a first comparison signal having a magnitude which is a function of the frequency and power output level of said input signal; c. means responsive to said input signal to provide a second comparison signal having an amplitude which is a function of the power output level of said input signal; and d. means for subtracting the magnitudes of said first and second comparison signals, and amplifying said difference signal to provide a tuning signal for tuning said signal supply means.

Claim 8

A frequency control and stabilization system as described in claim 5 wherein the signal supply means is a voltage tuned variable frequency oscillator and said frequency filter means is a voltage tunable filter.

Claim 9

A frequency control and stabilizaton system as described in claim 6 wherein said filter is a low pass filter.

Claim 10

A frequency control and stabilization system comprising: a. a tunable signal supply means for supplying a first signal at a frequency and a power output level; b. a frequency filter circuit means for producing a first comparison signal having a first voltage-frequency response characteristic including a first portion wherein voltage decreases with increasing frequency and a magnitude proportional to said power output level; c. circuit means for producing a second comparison signal having a second voltage-frequency characteristic including a second portion wherein voltage increases with increasing frequency, said first and second portions intersecting at a predetermined frequency, the magnitude of said second voltage-frequency characteristic also being proportional to the power output level of said first voltage-frequency characteristic; and d. means for subtracting the magnitude of said first and second comparison signals to form a tuning signal having a third voltage-frequency characteristic which includes a steep, near vertical, portion with said predetermined frequency at the midpoint, said tuning signal being coupled to said tunable signal supply means.

Claim 11

A frequency control and stabilization system comprising: a. a tunable signal supply means for supplying a first signal at a frequency and a power output level; b. a frequency filter circuit means for producing a first comparison signal having a first voltage-frequency response characteristic including a first portion wherein voltage decreases with increasing frequency and a magnitude proportional to said power output level; c. circuit means for producing a second comparison signal having a second voltage-frequency characteristic including a second portion wherein voltage increases with increasing frequency, said first and second portions intersecting at a predetermined frequency, the magnitude of said second voltage-frequency characteristic also being proportional to the power output level of said first voltage-frequency characteristic; and d. means for subtracting the magnitude of said first and second comparison signals to form a tuning signal having a third voltage-frequency characteristic which includes a steep, near vertical, portion with said predetermined frequency at the midpoint, said tuning signal being coupled to said tunable signal supply means.

Claim 12

A frequency discriminator for producing a signal representative of the frequency of an applied input signal comprising: a. a frequency filter circuit means forproducing a first comparision signal having a first voltage-frequency response characteristic including a firsst portion wherein voltage decreases with increasing frequency; b. circuit means for producing a second comparison signal having a second voltage-frequency characteristic including a second portion wherein voltage increases with increasing frequency, said first and second portions intersecting at a predetermined frequency, said second voltage-frequency characteristic being proportional to the power of said first voltage-frequency characteristic; and c. means for subtracting the magnitude of said first and second voltage-frequency to form a third voltage-frequency characteristic which includes a steep, near vertical, portion with said predetermined frequency at the midpoint and which is representative of the frequency of said input signal.

Claim 13

A frequency discriminator for producing a signal representative of the frequency of an applied input signal comprising: a. a frequency filter circuit means forproducing a first comparision signal having a first voltage-frequency response characteristic including a firsst portion wherein voltage decreases with increasing frequency; b. circuit means for producing a second comparison signal having a second voltage-frequency characteristic including a second portion wherein voltage increases with increasing frequency, said first and second portions intersecting at a predetermined frequency, said second voltage-frequency characteristic being proportional to the power of said first voltage-frequency characteristic; and c. means for subtracting the magnitude of said first and second voltage-frequency to form a third voltage-frequency characteristic which includes a steep, near vertical, portion with said predetermined frequency at the midpoint and which is representative of the frequency of said input signal.

Claim 14

A discriminator as described in claim 9 wherein said frequency filter circuit means is a tunable filter and said circuit means is a constant attenuation attenuator network.