Semiconductor integrated circuit device provided with a differential amplifier
First Claim
1. A semiconductor integrated circuit device provided with a differential amplifier, said differential amplifier comprising:
- first and second first conductivity type MOS transistors to respective gates of which input signals are fed, said first and second transistors constituting a differential pair; and
third and fourth second conductivity type MOS transistors, drains of which are connected to drains of said first and second first conductivity type MOS transistors, respectively said third and fourth transistors constituting a load transistor pair with respect to said differential pair,an output signal being delivered through one of a node between said first MOS transistor and said third MOS transistor and a node between said second MOS transistor and said fourth MOS transistor,wherein said first, second, third and fourth MOS transistors are made to operate in a weak inversion region.
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Accused Products
Abstract
A differential amplifier comprises an n-channel MOS transistor to the gate of which an input voltage VIN1 is fed, and an n-channel MOS transistor to the gate of which an input voltage VIN2 is fed. A p-channel MOS transistor arranged in such a manner that, to the source thereof, a power source voltage Vcc is fed, and the gate and drain thereof are connected to the drain of the MOS transistor, and a p-channel MOS transistor arranged in such a manner that the gate thereof is connected to the drain of the MOS transistor, the drain thereof is connected to the drain of the MOS transistor, and the voltage at this drain is outputted as an output voltage VOUT, and the output current I of a constant-current source is set so that the transistors constituting a differential amplifier may operate in a weak inversion zone.
26 Citations
28 Claims
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1. A semiconductor integrated circuit device provided with a differential amplifier, said differential amplifier comprising:
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first and second first conductivity type MOS transistors to respective gates of which input signals are fed, said first and second transistors constituting a differential pair; and third and fourth second conductivity type MOS transistors, drains of which are connected to drains of said first and second first conductivity type MOS transistors, respectively said third and fourth transistors constituting a load transistor pair with respect to said differential pair, an output signal being delivered through one of a node between said first MOS transistor and said third MOS transistor and a node between said second MOS transistor and said fourth MOS transistor, wherein said first, second, third and fourth MOS transistors are made to operate in a weak inversion region. - View Dependent Claims (2, 15, 17, 19, 21, 25, 26, 27, 28)
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3. A semiconductor integrated circuit device provided with a differential amplifier, said differential amplifier comprising:
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a first conductivity type MOS transistor to a gate of which a first input voltage is fed; a second first conductivity type MOS transistor to a gate of which a second input voltage is fed; a third second conductivity type MOS transistor arranged in such a manner that, to a source thereof, a first voltage is fed, and a gate and a drain thereof are connected to a drain of said first MOS transistor; and a fourth second conductivity type MOS transistor arranged in such a manner that, to a source thereof, said first voltage is fed, and a gate thereof is connected to the drain of said first MOS transistor, while a drain thereof is connected to a drain of said second MOS transistor, and a voltage at the drain of said fourth MOS transistor is outputted as an output voltage, wherein said first and second MOS transistors and said third and fourth MOS transistors are made to operate in a weak inversion region. - View Dependent Claims (4, 5, 6, 7, 8, 9, 13)
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10. A semiconductor integrated circuit device provided with a differential amplifier, said differential amplifier comprising:
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first and second first conductivity type MOS transistors to respective gates of which input signals are fed, said first and second MOS transistors constituting a differential pair; third and fourth second conductivity type MOS transistors drains of which are connected to drains of said first and second first conductivity type MOS transistors, respectively, said third and fourth MOS transistors constituting a load transistor pair with respect to said differential pair; wherein, through one of a node between said first MOS transistor and said third MOS transistor and a node between said second MOS transistor and said fourth MOS transistor, an output signal is outputted; and wherein at least one of the pair of said first and second MOS transistors, and the pair of said third and fourth MOS transistors, is comprised of intrinsic MOS transistors. - View Dependent Claims (11, 12, 14, 16, 18, 20, 22, 23, 24)
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Specification