My project needs to drive a medium power ultrasonic piezoelectric transducer from a sine wave ( / sawtooth) sweep generator that sweeps +/- 2% of the transducer resonant frequency. The question: What are my simplest options for driving these transducers from a DDS generated shaped signal, with reasonably low distortion (5-10%)? • Use a power amplifier IC off a higher voltage rail, with lots of heat sinking, to directly drive the transducer • Use a power amplifier IC, then (?) a transistor current amplification stage, then an appropriate (need help identifying) step-up transformer to drive the transducer • Use some sort of (need help identifying) class D high power amplifier IC that would not need much heat sinking ( Edit: Not a solution, see Note 7). • Some other option entirely • Edit: From suggestion below Identify an off the shelf OEM amplifier module that meets the parameters and constraints.

HIGH SPEED, INTEGRATED ULTRASOUND DRIVER IC. Drives two ultrasound transducer channels; Generates five-level waveform; Drives. They are designed to have the same impedance and can provide peak currents of over 2.0amps.

Missis bredli torrenttorrent. UPDATE: [15-Oct-2012] Option 5 above seems best answer, if a suitable OEM module or two could be pointed out - None found in my research so far. Hence leaving question open. The sweep waveform generation is through a DDS IC, AD9850, Datasheet here: One of the transducers available to me: 5938D-25LBPZT-4 () • Resonant frequency: 25 KHz • Resonant impedance: 10-20 Ohms • Capacitance: 5400 pf +/-10% • Input power: 60W • Datasheet: I wish I could find one! The transducer would change case to case, from 20KHz to 135KHz, each in the 50-250 watt range, similar in design to the one above.

The driver designs I have seen for these transducers typically use switching i.e. Square waves to drive them, MOSFET driven, with Vpp 100v in some cases! ( Do these devices even need that kind of voltage? Edit: Evidently so) Some drivers use tuned filters to shape the waveform to a sine or approximation thereof. This does not work for my purposes, unfortunately - The project is a single device that would first detect the resonant frequencies of an attached transducer across the full range 20-135KHz, then sweep around each resonant frequency with first a sine wave, ( Edit: Removing this requirement as unfeasible: then a sawtooth signal,) at a specified power output, usually around half the rated power of the transducer. So what I am looking for is the wisdom of this community in suggesting a suitable prototype-friendly approach to getting those DDS waveforms over to the transducer.

Thank you all! Usb driver download. Added some notes based on comments and responses received: • Waveform accuracy is not super-critical, 5% distortion is very acceptable. Thermal issues and power wastage through dissipation in the amplifier stage are bigger concerns.

Cost is a key concern, at least until past the prototype stage. • It has been suggested that prebuilt OEM amplifier modules that suit the requirements might be my best bet. While that does appeal, I am still hoping for alternatives in addition to, and examination of, the options I have proposed in my question, hence not marking the answer accepted, yet. • Not found any OEM module online yet which covers a 20KHz to 135KHz frequency range, even for 50 watt output. The one suggested in a response is designed for 3.5KHz, and its switching frequency is 100KHz. ( Dropped this requirement: Also, wouldn't I require bandwidth much higher than that, to handle a sawtooth wave with even cursory accuracy?