High efficiency multivibrator

Claim 2

A high efficiency multivibrator circuit including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals, first control circuit means coupled to said base electrodes of said first and fourth transistors and to said second bridge terminal, said first control circuit including first resistance means connected to said base electrode of said fourth transistor, second control circuit means coupled to said base electrodes of said second and third transistors and to said fourth bridge terminal, said second control circuit including second resistance means connected to said base electrode of said third transistor, and switch means selectively connecting said first and second resistance means to said first supply terminal to control the conductivity of said transistor to thereby control energization of said load means from said power supply means.

Claim 3

A high efficiency multivibrator circuit, including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals have a center tap thereon, first control circuit means coupled to said base electrodes of said first and fourth transistors and to said second bridge terminal, said first control circuit means including first resistance means coupling said center tap of said load means to said base electrode of said fourth transistor, and second control circuit means coupled to said base electrodes of said second and third transistors and to said fourth bridge terminal, said second control circuit means including second resistance means coupling said center tap of said load means to said base electrode of said third transistor.

Claim 4

A high efficiency multivibrator circuit, including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals have a center tap thereon, first control circuit means coupled to said base electrodes of said first and fourth transistors and to said second bridge terminal, said first control circuit means including first resistance means coupling said center tap of said load means to said base electrode of said fourth transistor, and second control circuit means coupled to said base electrodes of said second and third transistors and to said fourth bridge terminal, said second control circuit means including second resistance means coupling said center tap of said load means to said base electrode of said third transistor.

Claim 5

The multivibrator circuit of claim 2 wherein said load means includes third and fourth resistance means connected together at said center tap.

Claim 6

A high efficiency multivibrator circuit, including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals and having a high impedance to relatively high frequency alternating currents and a low impedance to relatively low frequency alternating currents, first control circuit means including first resistance means and first capacitance means connected in series between said base electRode of said first transistor and said base electrode of said fourth transistor, said first control circuit means including first constant current supply means coupled to said first supply terminal and to said base electrode of said fourth transistor, second control circuit means including second resistance means and second capacitance means connected in series between said base electrode of said second transistor and said base electrode of said third transistor, said second control circuit means including said constant current supply means coupled to said first supply terminal and to said base electrode of said third transistor, and input circuit means for receiving an input signal and differentially coupling the same to said first and second constant current supply means for regulating the current supplied to said first and second capacitance means.

Claim 7

A high efficiency multivibrator circuit, including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals and having a high impedance to relatively high frequency alternating currents and a low impedance to relatively low frequency alternating currents, first control circuit means including first resistance means and first capacitance means connected in series between said base electRode of said first transistor and said base electrode of said fourth transistor, said first control circuit means including first constant current supply means coupled to said first supply terminal and to said base electrode of said fourth transistor, second control circuit means including second resistance means and second capacitance means connected in series between said base electrode of said second transistor and said base electrode of said third transistor, said second control circuit means including said constant current supply means coupled to said first supply terminal and to said base electrode of said third transistor, and input circuit means for receiving an input signal and differentially coupling the same to said first and second constant current supply means for regulating the current supplied to said first and second capacitance means.

Claim 8

A high efficiency multivibrator circuit, including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals, first control circuit means including first resistance means and first capacitance means connected in series between said base electrode of said first transistor and said base electrode of said fourth transistor, second control circuit means including second resistance means and second capacitance means connected in series between said base electrode of said second transistor and said base electrode of said third transistor, and switch means operable to a first position for coupling the junction between said first capacitance means and said first resistance means to said second supply terminal and to a second position for coupling the junction between said second capacitance means and said second resistance means to said second supply terminal.

Claim 9

A high efficiency multivibrator circuit, including in combination, first, second, third and fourth bridge terminals, first and second transistors of a first polarity type and third and fourth transistors of a second polarity type opposite to said first polarity type, said first and second transistors each having emitter electrodes connected to said first bridge terminal, collector electrodes connected to said fourth and second bridge terminals respectively and base electrodes, said third and fourth transistors each having collector electrodes connected to said second and fourth bridge terminals respectively, emitter electrodes connected to said third bridge terminal and base electrodes, power supply means having a first supply terminal coupled to said first bridge terminal and a second supply terminal coupled to said third bridge terminal, load means connected between said second and fourth bridge terminals, first control circuit means including first resistance means and first capacitance means connected in series between said base electrode of said first transistor and said base electrode of said fourth transistor, second control circuit means including second resistance means and second capacitance means connected in series between said base electrode of said second transistor and said base electrode of said third transistor, and switch means operable to a first position for coupling the junction between said first capacitance means and said first resistance means to said second supply terminal and to a second position for coupling the junction between said second capacitance means and said second resistance means to said second supply terminal.

Claim 10

The multivibrator circuit of claim 5 further including logic means coupled to said switch means for operating the same whereby one of said first and second positions of said switch means is momentarily activated.

Claim 11

The multivibrator circuit of claim 5 wherein said load means includes relay means, and said switch means is provided by the contacts of said relay means and is operated to said first position in response to current flow through said load means in one direction and is operated to said second position in response to current flow through said load means in the opposite direction.

Claim 12

The multivibrator circuit of claim 7 including further switch means connected in series from said second supply terminal to said first recited switch means.

Claim 13

The multivibrator circuit of claim 8 further including third resistance means coupled from said base electrode of said fourth transistor to said second supply terminal and fourth resistance means coupled from said base electrode of said third transistor to said second supply terminal.