Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
236 words
A differential current amplifier circuit comprising first to sixth bipolar transistors of the same polarity, first and second resistors, characterized in that: said first and second bipolar transistors have their emitters connected to each other; said first and second resistors are coupled between the collector-base path of said first bipolar transistor and that of said second bipolar transistor the base and collector of said third bipolar transistor are connected together, and the collector-emitter path thereof is connected between the emitter node of the first and second bipolar transistors and a predetermined potential terminal; the base and emitter of said fourth bipolar transistor are connected to the base and emitter of said third bipolar transistor, respectively; said fifth and sixth bipolar transistors have their emitters connected to each other, the node of which is coupled to the collector of the fourth bipolar transistor; the bases of said fifth and sixth bipolar transistors are connected to the the collectors of said second and first bipolar transistors, respectively; the collectors of said fifth and sixth bipolar transistors are coupled to the a second output terminal and a first output terminal, respectively; and said first and second bipolar transistors have their bases connected together, and their collectors connected to a first signal input terminal and a second signal input terminal, respectively, or have their collectors connected together, and their bases connected to the first and second signal input terminals, respectively.
Claim 2
Dependent Claim
236 words
A differential current amplifier circuit comprising first to sixth bipolar transistors of the same polarity, first and second resistors, characterized in that: said first and second bipolar transistors have their emitters connected to each other; said first and second resistors are coupled between the collector-base path of said first bipolar transistor and that of said second bipolar transistor the base and collector of said third bipolar transistor are connected together, and the collector-emitter path thereof is connected between the emitter node of the first and second bipolar transistors and a predetermined potential terminal; the base and emitter of said fourth bipolar transistor are connected to the base and emitter of said third bipolar transistor, respectively; said fifth and sixth bipolar transistors have their emitters connected to each other, the node of which is coupled to the collector of the fourth bipolar transistor; the bases of said fifth and sixth bipolar transistors are connected to the the collectors of said second and first bipolar transistors, respectively; the collectors of said fifth and sixth bipolar transistors are coupled to the a second output terminal and a first output terminal, respectively; and said first and second bipolar transistors have their bases connected together, and their collectors connected to a first signal input terminal and a second signal input terminal, respectively, or have their collectors connected together, and their bases connected to the first and second signal input terminals, respectively.
Claim 3
Dependent Claim
51 words
The differential current amplifier circuit according to claim 1, characterized in that said first to sixth bipolar transistors are NPN transistors, said first and second bipolar transistors have substantially the same characteristic, said first and second resistors have substantially the same resistance, and said predetermined potential terminal is a ground-potential terminal.