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US 4,059,809 AGranted
Differential amplifier
AssigneeSiemens Aktiengesellschaft
InventorFrithjof V. Sichart
Life of this patent
Estimating the term…
Abstract
A differential amplifier constructed from at least two metal oxide semiconductor (MOS) transistors is described. Input voltages are individually applied to the control electrodes of the transistors. The source-drain paths of the transistors are connected in series at a common junction point, and the other terminals thereof are connected to a supply voltage. The differential output voltage is taken from the aforementioned common junction point.
Claims6
A differential amplifier, comprising:
- supply voltage means,
- first and second metal oxide semiconductor (MOS) transistors of, respectively, the depletion and enhancement types, the source-drain paths of said transistors being connected in series at a common junction point such that the source terminal of said first transistor is connected to the drain terminal of said second transistor, the other terminals of said source-drain paths being connected to said supply voltage means, said transistors having control electrodes connected, respectively, directly to separate input voltages the difference between which is to be indicated and
- output terminal means connected to said common junction point for producing differential voltages corresponding to the difference between said input voltages.
Dependencies are inferred from the claim text.