Amplifier system

Claim 2

An amplifier system, comprising in combination, a driver stage, an output stage, power source means having a first and a second power source terminal, said driver stage including, first and second transistors being of the same conductivity type, first And second driver stage output means, resistor means connecting the emitter of said first transistor only to said first power source terminal, means directly connecting the collector of said first transistor only to said first driver stage output means, means directly connecting the collector of said second transistor only to said second power source terminal, resistor means connecting the emitter of said second transistor to said second drive stage output means, means connecting a differential input to the bases of said first and second transistors, and said output stage including, an output, third and fourth transistors being of a different conductivity type from one another and each having an emitter and a collector, means connecting said collectors of said third and fourth transistors to said first and second power source terminals, respectively, resistor means connecting said emitters of said third and fourth transistors to said output, diode means directly interconnecting the bases of said third and fourth transistor, and coupling means connecting said first and second driver stage output means to the bases of said third and fourth transistors resulting in said driver stage having a differential input driving said output stage consisting of push-pull complementary symmetry transistors with a single ended output.

Claim 3

An amplifier as set forth in claim 1, wherein said third transistor is one of a Darlington pair of transistors and said fourth transistor is one of a Darlington pair of transistors.

Claim 4

An amplifier as set forth in claim 1, wherein said coupling means includes direct connections from said first and second driver stage output means to the bases of said third and fourth transistors.

Claim 5

An amplifier system as set forth in claim 3, including, fifth and sixth transistors of the opposite conductivity type, an output terminal, resistive means connecting the collectors of said fifth and sixth transistors to said output terminal, resistive means connecting the emitters of said fifth and sixth transistors to said first and second power source terminal, respectively, means directly connecting the bases of said fifth and sixth transistors to the collectors of said third and fourth transistors, respectively, and means interconnecting said output with said output terminal.

Claim 6

An amplifier as set forth in claim 1, wherein said diode means includes a plurality of diode means having an intermediate point, and said coupling means including means connecting said intermediate point to said first and second driver stage output means.

Claim 7

An amplifier system, comprising in combination, a differential input stage, a pre-driver stage, a driver stage, an output stage, a feedback stage, and power source means having a first and a second power source terminal, said differential input stage including; an input having an inverting and a non-inverting terminal, A and B transistors being of the same conductivity type, means connecting said input to the bases of said A and B transistors, resistor means connecting the emitters of said A and B transistors to said first power source terminal, said pre-driver stage including; C and D transistors of the opposite conductivity type from said A and B transistors, resistor means connecting the emitters of said C and D transistors to said second power source terminal, means directly connecting the collectors of said A and B transistors to the bases of said C and D transistors, respectively, said driver stage including; first and second transistors of the same conductivity type as said A and B transistors, first and second driver stage output means, resistor means connecting the emitter of said first transistor only to said first power source terminal, means connecting the collector of saId first transistor only to said first driver stage output means, means connecting the collector of said second transistor only to said second power source terminal, resistor means connecting the emitter of said second transistor to said second driver stage output means, bias means for said first and second transistors, means connecting the collectors of said C and D transistors directly to the bases of said first and second transistors, respectively, said output stage including; an output, an output terminal, third and fourth transistors being of a different conductivity type from one another, means directly connecting the collectors of said third and fourth transistors to said first and second power source terminals, respectively, resistor means connecting the emitters of said third and fourth transistors to said output, a plurality of diode means directly interconnecting the bases of said third and fourth transistors, means connecting said first and second driver stage output means to the bases of said third and fourth transistors, respectively, resulting in an complementary symmetry single ended output stage responding to an input to said differential input stage, capacitor means connecting said output to said output terminal to eliminate distortion, and said feedback stage including; impedance means connected from said output to said inverting input terminals to control amplifier gain thereby.

Claim 8

An amplifier system, comprising in combination, a differential input stage, a pre-driver stage, a driver stage, an output stage, a feedback stage, and power source means having a first and a second power source terminal, said differential input stage including; an input having an inverting and a non-inverting terminal, A and B transistors being of the same conductivity type, means connecting said input to the bases of said A and B transistors, resistor means connecting the emitters of said A and B transistors to said first power source terminal, said pre-driver stage including; C and D transistors of the opposite conductivity type from said A and B transistors, resistor means connecting the emitters of said C and D transistors to said second power source terminal, means directly connecting the collectors of said A and B transistors to the bases of said C and D transistors, respectively, said driver stage including; first and second transistors of the same conductivity type as said A and B transistors, first and second driver stage output means, resistor means connecting the emitter of said first transistor only to said first power source terminal, means connecting the collector of saId first transistor only to said first driver stage output means, means connecting the collector of said second transistor only to said second power source terminal, resistor means connecting the emitter of said second transistor to said second driver stage output means, bias means for said first and second transistors, means connecting the collectors of said C and D transistors directly to the bases of said first and second transistors, respectively, said output stage including; an output, an output terminal, third and fourth transistors being of a different conductivity type from one another, means directly connecting the collectors of said third and fourth transistors to said first and second power source terminals, respectively, resistor means connecting the emitters of said third and fourth transistors to said output, a plurality of diode means directly interconnecting the bases of said third and fourth transistors, means connecting said first and second driver stage output means to the bases of said third and fourth transistors, respectively, resulting in an complementary symmetry single ended output stage responding to an input to said differential input stage, capacitor means connecting said output to said output terminal to eliminate distortion, and said feedback stage including; impedance means connected from said output to said inverting input terminals to control amplifier gain thereby.