Tunable phase shift resonant circuit stabilized crystal oscillator

Claim 1

IN A MULTIPLE SELECTIVE OUTPUT FREQUENCY STABILIZED CRYSTAL OSCILLATOR CIRCUIT: A REFERENCE FREQUENCY OSCILLATOR; A BANK OF CRYSTAL FILTERS EACH DESIGNED FOR A PARTICULAR INDIVIDUAL FREQUENCY BANDPASS; MEANS FOR CONNECTING OUTPUT CIRCUIT MEANS TO THE DESIRED CRYSTAL FILTER; A TUNEABLE PHASE SHAFT RESONANT CIRCUIT; VOLTAGE BIAS MEANS CONNECTED TO SAID TUNEABLE PHASE SHAFT RESONANT CIRCUIT FOR BIASING THE TUNEABLE PHASE SHIFT RESONANT CIRCUIT TO A RESONANT FREQUENCY RANGE CONSISTENT WITH THE FREQUENCY BANDPASS RANGE OF THE SELECTED CRYSTAL FILTER AND THE TUNEABLE PHASE INCLUDING THE SELECTED CRYSTAL FILTER AND THE TUNEABLE PHASE SHIFT RESONANT CIRCUIT; SIGNAL FEEDBACK MEANS FROM SAID TUNEABLE PHASE SHIFT RESONANT CIRCUIT TO A BUFFLER AMPLIFIER; A PHASE DISCRIMINATOR; SIGNAL PATH MEANS CONNECTING THE OUTPUT SIGNAL OF SAID REFERENCE OSCILLATOR TO SAID PHASE DISCRIMINATOR, AND SIGNAL PATH MEANS CONNECTING THE OUTPUT SIGNAL OF SAID BUFFER AMPLIFIER TO SAID PHASE DISCRIMINATOR; PULSE GENERATING MEANS INCLUDING IN ONE OF SAID SIGNAL PATH MEANS CONNECTING SIGNALS TO SAID PHASE DISCRIMINATOR; VOLTAGE VARIABLE CIRCUIT CAPABLE OF VARYING THE FREQUENCY OF SHIFT RESONANT CIRCUIT CAPABLE OF VARYING THE FREQUENCY OF SAID TUNEABLE PHASE SHIFT RESONANT CIRCUIT BY BIAS VOLTAGE VARIATION APPLIED TO SAID VOLTAGE VARIABLE CAPACITIVE MEANS; MEANS COUPLING THE OUTPUT OF SAID PHASE DISCRIMINATOR AS A VARIABLE VOLTAGE BIAS FREQUENCY VARYING INPUT OF SAID TUNEABLE PHASE SHIFT RESONANT CIRCUIT; WHEREIN SAID VOLTAGE VARIABLE CAPACITIVE MEANS IN THE TUNABLE PHASE SHIFT RESONANT CIRCUIT INCLUDES TWO SOLID STAGE VOLTAE VARIABLE CAPACITORS, EACH HAVING AN ANODE ELECTRODE AND A CATHODE ELECTRODE, AND WITH A COMMON JUNCTION BETWEEN LIKE ELECTRODES OF THE VOLTAGE VARIABLE CAPACITORS BEING THE INPUT JUNCTION RECEIVING A VARIABLE VOLTAGE BIAS PHASE DISCRIMINAING INPUT DEVELOPED AS AN OUTPUT BY SAID PHASE DISCRIMINATOR; AND WHEREIN SAID COMMON JUNCTION BETWEEN THE VOLTAGE VARIABLE CAPACITORS IS BETWEEN ANODES OF SAID VOLTAGE VARIABLE CAPACITORS, AND THE CATHODES OF SAID VOLTAGE VARIABLE CAPACITORS ARE CONNECTED THROUGH A PRIMARY COIL OF A SIGNAL COUPLING TRANSFORMER HAVING A SECONDARY COIL WITH END TERMINALS CONNECTED TO THE BANK OF SAID CRYSTAL FILTERS FOR PROVIDING INPUT SIGNALS TO THE CRYSTAL FILTERS.