Circuit arrangement for enhancing the transconductance of a differential amplifier stage comprising MOS transistors
AssigneeSGS-Thomson Microelectronics S.A.
InventorsGermano Nicollini, Rinaldo Castello
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Abstract
A circuit arrangement for enhancing the transconductance of a differential amplifier stage comprising a pair of MOS transistors, having respective source electrodes connected together through a circuit node, comprises a pair of active components respectively connected in each of the connections between the aforesaid electrodes and the aforesaid node and serving a characteristic function corresponding to that of a negative value resistor. This arrangement enables the transconductance of the differential stage to be increased while keeping the dissipated electric power low and the area occupied in an integrated circuit small.
Claims6
A circuit arrangement for enhancing the transconductance of a differential amplifier stage comprising:
- a pair of MOS-type transistors (M1, M2) having respective source electrodes connected together through a circuit node;
- a pair of active components (M3, M4), each connected in a respective connection between said electrodes and said node such that each of said active components characteristically corresponds to a negative value resistor;
- and
- a pair of identical current sources (I1, I1), each having one end connected to a corresponding source electrode of said transistor pair.
Dependencies are inferred from the claim text.