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US 9,634,629 B2Granted
Semiconductor amplifier circuit
AssigneeKabushiki Kaisha Toshiba
InventorsFumiya Watanabe, Mikihiko Ito, Masaru Koyanagi
Life of this patent
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Abstract
According to one embodiment, a semiconductor amplifier circuit includes: a first amplifier circuit including first and second P-type transistors; a second amplifier circuit including first and second N-type transistors; and first to seventh current mirror circuits. The first and second current mirror circuits are connected to drains of the first and second P-type transistors. The third and fourth current mirror circuits are connected to drains of the first and second N-type transistors. The sixth current mirror circuit is connected to the first, fourth and fifth current mirror circuits. The seventh current mirror circuit is connected to the second, third and fifth current mirror circuits.
Claims18
A semiconductor amplifier circuit comprising:
- a first amplifier circuit including a first P-type transistor to which an input signal from an outside is supplied, and a second P-type transistor to which a reference voltage is supplied;
- a second amplifier circuit including a first N-type transistor to which the input signal is supplied, and a second N-type transistor to which the reference voltage is supplied;
- a first current mirror circuit connected to a drain of the first P-type transistor;
- a second current mirror circuit connected to a drain of the second P-type transistor;
- a third current mirror circuit connected to a drain of the first N-type transistor;
- a fourth current mirror circuit connected to a drain of the second N-type transistor;
- a fifth current mirror circuit;
- a sixth current mirror circuit connected to the first, fourth and fifth current mirror circuits;
- a seventh current mirror circuit connected to the second, third and fifth current mirror circuits;
- a first constant current source circuit including a first terminal connected to a power supply terminal and a second terminal connected to a source of the first P-type transistor and to a source of the second P-type transistor;
- and
- a second constant current source circuit including a first terminal connected to a ground terminal and a second terminal connected to a source of the first N-type transistor and to a source of the second N-type transistor.
9 more elements
A semiconductor amplifier circuit comprising:
- a first amplifier circuit;
- a second amplifier circuit;
- and
- first to fifth current mirror circuits,
- wherein the first amplifier circuit includes a first P-type transistor to which an input signal from an outside is supplied, a second P-type transistor to which a reference voltage is supplied, and first and second N-type transistors;
- a gate and a drain of the first N-type transistor are connected to a drain of the first P-type transistor,
- a gate and a drain of the second N-type transistor are connected to a drain of the second P-type transistor,
- the second amplifier circuit includes a third N-type transistor to which the input signal is supplied, a fourth N-type transistor to which the reference voltage is supplied, and third and fourth P-type transistors;
- a gate and a drain of the third P-type transistor are connected to a drain of the third N-type transistor,
- a gate and a drain of the fourth P-type transistor are connected to a drain of the fourth N-type transistor,
- the first current mirror circuit includes a fifth N-type transistor and a sixth N-type transistor,
- a gate of the fifth N-type transistor is connected to the drain of the first P-type transistor and to a gate and a drain of the sixth N-type transistor,
- the second current mirror circuit includes a seventh N-type transistor and an eighth N-type transistor,
- a gate of the seventh N-type transistor is connected to the drain of the second P-type transistor and to a gate and a drain of the eighth N-type transistor,
- the third current mirror circuit includes a fifth P-type transistor and a sixth P-type transistor,
- a gate of the fifth P-type transistor is connected to the drain of the third N-type transistor and to a gate and a drain of the sixth P-type transistor, and a drain of the fifth P-type transistor is connected to the drain of the second P-type transistor,
- the fourth current mirror circuit includes a seventh P-type transistor and an eighth P-type transistor,
- a gate of the seventh P-type transistor is connected to the drain of the fourth N-type transistor and to a gate and a drain of the eighth P-type transistor, and a drain of the seventh P-type transistor is connected to the drain of the first P-type transistor,
- the fifth current mirror circuit includes a ninth P-type transistor and a tenth P-type transistor,
- a gate and a drain of the ninth P-type transistor are connected to a drain of the fifth N-type transistor, and
- a gate of the tenth P-type transistor is connected to the gate of the ninth P-type transistor, and a drain of the tenth P-type transistor is connected to a drain of the seventh N-type transistor.
18 more elements
Dependencies are inferred from the claim text.