BY CASCADE CONNECTION OF GENERAL POWER MOSFETS, A LOW-COST, HIGH PERFORMANCE PULSER IS DESIGNED FOR ULTRASOUND IMAGING

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KERMANI S.

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Seminar Paper

Paper Information

Seminar: IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING
Year:2004 | Issue:11

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Title

BY CASCADE CONNECTION OF GENERAL POWER MOSFETS, A LOW-COST, HIGH PERFORMANCE PULSER IS DESIGNED FOR ULTRASOUND IMAGING

Author(s)

KERMANI S.

Keywords

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Abstract

AN IMPORTANT COMPONENT OF EVERY ULTRASOUND SYSTEM IS THE HIGH VOLTAGE PULSER, WHICH IS USED TO EXCITE THE TRANSDUCERS. DESIGNING A HIGH PERFORMANCE PULSER CAN BE A CHALLENGING AND A COSTLY PROCEDURE, PARTICULARLY FOR THE ULTRASOUND SYSTEMS. RECENTLY, A HIGH-SPEED POWER MOSFETS HAS BECOME AVAILABLE AT A REASONABLE PRICE (US $20 - US $40).BY EXPLOITING A LARGE CURRENT AND A FAST SWITCHING SPEED OF THESE DEVICES, A VERY SIMPLE AND HIGH PERFORMANCE PULSER CAN COMPLETELY BE BUILT (1). IN THIS PAPER, A 500-VOLT (10A) PULSES WITH LESS THEN 8NS TRANSIENT TIME WAS DESIGNED.THE METHOD OF CASCODE CONNECTION OF POWER MOSFET IS USED BY SIMPLE GROUNDED SOURCE CONFIGURATIONS. OWING TO THE LARGE VOLTAGE, SWINGS (OVER NANOSECONDS TIME INTERVALS) AND THE LARGE JUNCTION CAPACITANCES, THE LARGE CURRENT DISPLACEMENT OF THE GATE MOSFET ARE PROTECTED BY USING A DIODE CLAMP.THE VARIABLE PULS WIDTH AND REPETITION IS ACCOMPLISHED WITH SN74LS624- “A VOLTAGE-CONTROLLED OSCILLATOR (VCO)” AND A FAST MONOSTABLE (74LS123).THE PULSER CAN PROVIDE 5KW PULSES. PULSES RANGING FROM 50 TO 1000 NS HAVE BEEN SUCCESSFULLY GENERATED WITH CONTROLLED REPETITION OF 100HZ - 2000HZ.THE ENTIRE CIRCUIT, INCLUDING THE POWER SUPPLY AND THE PULSE TRIGGER, CAN BE BUILT FOR LESS THAN US $40.

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APA: Copy

KERMANI, S.. (2004). BY CASCADE CONNECTION OF GENERAL POWER MOSFETS, A LOW-COST, HIGH PERFORMANCE PULSER IS DESIGNED FOR ULTRASOUND IMAGING. IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. SID. https://sid.ir/paper/905555/en

Vancouver: Copy

KERMANI S.. BY CASCADE CONNECTION OF GENERAL POWER MOSFETS, A LOW-COST, HIGH PERFORMANCE PULSER IS DESIGNED FOR ULTRASOUND IMAGING. 2004. Available from: https://sid.ir/paper/905555/en

IEEE: Copy

S. KERMANI, “BY CASCADE CONNECTION OF GENERAL POWER MOSFETS, A LOW-COST, HIGH PERFORMANCE PULSER IS DESIGNED FOR ULTRASOUND IMAGING,” presented at the IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. 2004, [Online]. Available: https://sid.ir/paper/905555/en

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