Differential amplifier circuit having offset adjustment circuit
AssigneeNEC Electronics Corporation
InventorToshiaki Motoyui
Life of this patent
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Abstract
A differential amplifier circuit includes an offset adjuster circuit for varying the active load to adjust the offset caused by the differential pair. The differential amplifier circuit includes fine adjustment cell sections including a plurality of transistors having the substantially same size, and shift cell sections including transistors, whose transistor size is larger than the transistors of the fine adjustment cell sections.
Claims4
A differential amplifier circuit including an offset adjusting circuit to adjust an offset generated by a differential pair, the offset adjusting circuit comprising:
- a fine adjustment cell section including a plurality of first transistors having substantially a same transistor size;
- and
- a shift cell section including a plurality of second transistors whose size is larger than the size of the plurality of first transistors of the fine adjustment cell section.
A differential amplifier circuit, comprising:
- a transistor pair which constitutes a differential pair;
- a first offset adjustment circuit including a plurality of first transistors having a substantially same size in order to adjust an offset produced by the transistor pair;
- and
- a second offset adjustment circuit including a plurality of second transistors which have a transistor size larger than the size of the first transistors in order to adjust the offset produced by the transistor pair.
Dependencies are inferred from the claim text.