Ultrasound transmitter with voltage-controlled rise/fall...

Details Ultrasound transmitter with voltage-controlled rise/fall... Ultrasound transmitter with voltage-controlled rise/fall...

2005-02-15

2005-02-15

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S112000, C327S170000

Reexamination Certificate

active

06856175

ABSTRACT:
In an ultrasound transmit ASIC, the rise and fall times of the output pulse can be controlled by varying the gate-source voltage used to drive the output-stage transistors. Control of the rise/fall times can be effected either by trimming on-chip during fabrication or by changing the gate-source voltage that drives the output-stage transistors, either on-chip or off-chip. In all cases it will be necessary to first test the manufactured device to determine how much calibration voltage needs to be applied.

REFERENCES:
patent: 5198747 (1993-03-01), Haight
patent: 5603324 (1997-02-01), Oppelt et al.
patent: 5942922 (1999-08-01), Dinteman et al.
patent: 6007755 (1999-12-01), Hoshii et al.
patent: 6278305 (2001-08-01), Tanaka
patent: 6380766 (2002-04-01), Savord
patent: 6501313 (2002-12-01), Boerstler et al.

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