Signal transfer circuit and circuit device using same
AssigneeTexas Instruments Incorporated
InventorAkira Takahashi
Life of this patent
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Abstract
A signal transfer circuit appropriate for use in realizing both high circuit stability and high current driving ability is disclosed. Signal transfer circuit A has current transfer circuit 3 that transfers a signal current via first reference current I1. In one embodiment, current transfer circuit 3 has current transcription circuit 30 that transcribes signal current Is to first current portion I1-1 of first reference current I1, and output current path 32 that transfers the first current portion I1-1. In one embodiment, current transfer circuit 30 has first current branching circuit 300 and second current branching circuit 302.
Claims4
A push-pull circuit comprising:
- an input terminal receiving an input signal;
- an output terminal for supplying an output signal;
- a first circuit that is electrically connected to the input terminal, receives a second current from the input terminal, and supplies current to the output terminal;
- a second circuit electrically connected to the input terminal, connected between a first node and a second node, for supplying current to the first node;
- a third circuit electrically connected between the output terminal and the first node, for converting the voltage difference between the output terminal and the first node to a current and providing it as a first current;
- a first constant current source for supplying a first constant current to the second node;
- a second constant current source for supplying a second constant current to the first node;
- a fourth circuit that supplies the sum current of the first current and the second current, which is the difference between the first constant current and the second constant current;
- and
- a fifth circuit that supplies a current corresponding to the sum current to the output terminal.
Dependencies are inferred from the claim text.