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Wave transmit IC cuts phase noise to -171dB

Posted: 09 Jan 2012 ?? ?Print Version ?Bookmark and Share

Keywords:wave transmit IC? MOSFET? medical ultrasound?

Supertex Inc. has launched a four channel, low phase noise, continuous wave transmit IC geared for transmitters of diagnostic medical ultrasound machines and fluid flow measurement devices. According to the company, the CW01 continuously sends a constant amplitude wave into the region to be examined. Then a resistor processes the echo of the wave signal for frequency shifts.

CW01 boasts a high speed D flip-flop and MOSFET to minimize phase noise to a typical level of -171dB below carrier. The D flip-flop allows CW01's input frequency to be aligned to a high frequency clock. When a logic high is clocked into the D flip-flop, the N-channel MOSFET is turned on. Data are then clocked in during the low to high transition.

"By providing very high speed data clocking, CW01 generates very little phase noise, and thus delivers highly accurate ultrasound images," said Stephen Lin, VP of marketing for Supertex. "The capability of the IC to withstand transmit voltages up to 100V allows for higher power scans and deeper body tissue imaging."

The RoHS compliant CW01 is available in a 24-lead QFN package (CW01K6-G). Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO. Pricing is $6.27 each for the CW01K6-G in 1K quantities.

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