Low power consumption oscillators with output level shifters

Details Low power consumption oscillators with output level shifters Low power consumption oscillators with output level shifters

1996-12-09

1998-05-26

Grimm, Siegfried H.

Oscillators

Ring oscillators

331 75, 331109, 331116FE, 331185, 327333, H03B 502, H03B 536

Patent

active

057572429

ABSTRACT:
A low power consumption oscillator circuit is provided with an oscillator. The oscillator responds to a voltage by producing an oscillating signal at its output having an amplitude that depends on the level of the voltage. Furthermore, the low power consumption oscillator circuit has a level shifter. Illustratively, according to one embodiment, the level shifter includes a pull-up driver and a pull-down driver connected in parallel between the oscillator output and an output of the level shifter. The pull-up driver is configured so as to refrain from conducting current between a biasing input of the pull-up driver and the level shifter output simultaneously with the pull-down driver when the oscillating signal exceeds a certain voltage level. The level shifter illustratively includes an intrinsic PMOS device.

REFERENCES:
patent: 4990847 (1991-02-01), Ishimaru et al.
patent: 5113156 (1992-05-01), Mahabadi et al.
patent: 5115434 (1992-05-01), Aizaki
patent: 5184094 (1993-02-01), Kohler
patent: 5483205 (1996-01-01), Kawamura
patent: 5486795 (1996-01-01), Spence et al.

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