| 摘要 |
A differential amplifier comprises first and second differential amplifier circuits. The first differential amplifier circuit includes a first N-type transistor and a second N-type transistor for constituting a differential pair, and operates based on a first input voltage VIN1. The second differential amplifier circuit includes a first P-type transistor and a second P-type transistor making up a differential pair, and operates based on a second input voltage VIN2. There is also provided a third P-type transistor operable based on a first signal S1 coming from the first differential amplifier circuit and a third N-type transistor operable based on a second signal S2 from the second differential amplifier circuit, wherein a voltage between these third P- and N-type transistors becomes an output voltage VOUT. The differential amplifier further comprises a first voltage control circuit which includes a fourth N-type transistor which rapidly changes the gate voltage of the third P-type transistor based on a third signal S3 from the second differential amplifier circuit. There is also provided a second voltage control circuit which includes a fourth P-type transistor which early changes the gate voltage of the third N-type transistor based on a fourth signal S4 from the first differential amplifier circuit.
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