Differential amplifier and display device using the same
First Claim
1. A differential amplifier comprising:
- a differential pair that receives an input signal, said differential pair including a pair of depletion-type transistors; and
a folded-cascode load circuit that acts an active load of said differential pair.
3 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a differential amplifier which comprises a differential pair comprising depletion-type first and second N-channel MOS transistors, a first current source that supplies a current for the differential pair, a current mirror circuit formed by transistor pairs connected in cascode fashion in two stages, for connecting an output pair of the differential pair in folded connection, second and third current sources connected to an input terminal of the current mirror circuit and an output terminal of the current circuit, respectively, and a buffer amplifier with that has an input terminal connected to the output terminal of the current mirror circuit and has an output terminal connected to an output terminal of the differential amplifier.
16 Citations
18 Claims
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1. A differential amplifier comprising:
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a differential pair that receives an input signal, said differential pair including a pair of depletion-type transistors; and
a folded-cascode load circuit that acts an active load of said differential pair. - View Dependent Claims (2, 12, 13, 16, 17, 18)
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3. A differential amplifier comprising:
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a differential pair that includes depletion-type first and second N-channel MOS transistors;
a first current source that supplies a current to said differential pair;
a current mirror circuit that includes plural stages of transistor pairs coupled in cascode fashion for setting an output pair of said differential pair in folded connection;
second and third current sources connected to an input terminal of said current mirror circuit and an output terminal of said current mirror circuit, respectively; and
an amplification stage that has an input terminal connected to said output terminal of said current mirror circuit and has an output terminal connected to an output terminal of said differential amplifier. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 14, 15)
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Specification