US 6,477,099 B2Granted

Integrated circuit with a differential amplifier

AssigneeInfineon Technologies AG

InventorsHelmut Fischer, Sebastian Kuhne, Thoai-Thai Le

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Abstract

An integrated circuit has a differential amplifier in a basic circuit having two input transistors, a load element and a power source. The power source has an N-type channel MOS transistor whose controlled path is connected to the input transistors and to a supply terminal of the power source. A control terminal of the transistor is connected to a potential that is positive with respect to a reference potential. The supply terminal of the power source is connected to a potential which is negative with respect to the reference potential and which is made available by a voltage source for switching off cell field transistors of a DRAM memory. The gate-source voltage that is increased in this way improves the behavior of the circuit with respect to fluctuations in potential and permits more favorable dimensioning of the transistor.

Claims2

Dependent claims

In combination with an integrated dynamic memory, an integrated circuit, comprising:

a differential amplifier to be connected to a reference potential and including:
a voltage source supplying a first potential which is negative with respect to the reference potential;
a load element;
a power source having a supply terminal;
two input transistors connected in parallel between said load element and said power source;
said power source having an N-type channel MOS transistor with a control terminal and a controlled path, said controlled path having a first end connected to said input transistors and a second end connected to said supply terminal, said control terminal of said N-type channel MOS transistor to be connected to a terminal for a second potential which is positive with respect to the reference potential;
and
said supply terminal of said power source connected to said voltage source for switching off cell field transistors of the integrated dynamic memory.

5 more elements

Dependencies are inferred from the claim text.