Level shift circuit

Details Level shift circuit Level shift circuit

1997-03-03

1998-10-06

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327331, 326 63, 326 68, H03K 1907

Patent

active

058182780

ABSTRACT:
A level shift circuit shifting logic levels of an SCFL circuit to logic levels of a DCFL circuit, including an SCFL circuit having complementary outputs; two source follower circuits with their inputs respectively connected to the complementary outputs of the SCFL circuit; a high/low detecting circuit detecting "high" or "low" signals which have DCFL levels from the two source follower circuits and outputting signals having logic levels according to the detection results; and DCFL circuits with inputs connected to outputs of the high/low detecting circuit. Therefore, it is possible to obtain a level shift circuit operating with a wider voltage range and in a wider temperature range than the prior art circuit.

REFERENCES:
patent: 5128556 (1992-07-01), Hirakata
patent: 5304870 (1994-04-01), Nagasawa

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