Level shift circuit

Details Level shift circuit Level shift circuit

1997-01-16

1999-04-20

Santamauro, Jon

Electronic digital logic circuitry

Interface

Logic level shifting

326 83, 326 17, H03K 190175

Patent

active

058960430

ABSTRACT:
A level shift circuit includes first and second operation circuits, a bias circuit, and a current control circuit. The first and second operation circuits include high-voltage transistors and low-voltage transistors connected in series. The high-voltage transistors are controlled according to a potential at the interconnection point between the low-voltage and high-voltage transistors of opposite operation circuits. The bias circuit is provided in a one-to-one correspondence with the operation circuits and connected to the low-voltage transistors in series to activate the transistors in the stationary on state and decrease currents flowing into the transistors to a stationary current. The current control circuit connects to the bias circuit in parallel to increase the currents just after the low-level transistors are turned on to a high peak current. The low-voltage transistors are turned on/off alternately in response to the state transition of an input signal. An operation object is turned on/off according to the potential at the interconnection point between both of the transistors of the second operation circuit.

REFERENCES:
patent: 4978870 (1990-12-01), Chen et al.
patent: 5371421 (1994-12-01), Kondoh et al.
patent: 5406142 (1995-04-01), Nakama et al.
patent: 5410266 (1995-04-01), Manley
patent: 5473268 (1995-12-01), Declercq et al.
patent: 5684415 (1997-11-01), McManus

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