Current-mode logic circuit

Details Current-mode logic circuit Current-mode logic circuit

1995-09-21

1996-08-27

Westin, Edward P.

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Field-effect transistor

326112, H03K 1920

Patent

active

055504914

ABSTRACT:
A current-mode logic circuit is provided having large gain and resistance to noise or power source fluctuations which employs in its logic circuits circuits that shape waves. Such a current-mode logic circuit entails little increase in the area of integrated circuits. In addition to a differential logic pair composed of MOS transistors M31 and M32, load elements R31 and R32, and constant-current source I31, the current-mode logic circuit of the present invention is provided with a holding transistor pair composed of MOS transistors M33 and M34. MOS transistors M31 and M32 have equal conductance, and MOS transistors M33 and M34 have equal conductance. In addition, the present invention is characterized in that the sum of conductance of MOS transistors M31 and M33 is a constant if the electrical power consumption of the circuits is constant.

REFERENCES:
patent: 4570084 (1986-02-01), Griffin
patent: 4808851 (1989-02-01), Chantepie
patent: 4924116 (1990-05-01), Vu et al.
patent: 4973864 (1990-11-01), Nogami
patent: 5149992 (1992-09-01), Allstot
D. J. Allstot et al., "Analog Logic Techniques Steer Around the Noise", IEEE Circuits & Devices, Sep. 1993, pp. 18-21.
M. Mizuno et al., "A GHz MOS Adaptive Pipeline Technique Using Variable Delay Circuits", IEEE 1994 Symposium on VLSI Circuits Digest of Technical Papers, pp. 27-28.

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