Download BSN-10 is an 8–channel rf generator working at pulse width

BSN-10 is an 8–channel rf generator working at pulse width modulated (PWM). It supports ultrasound
transducer at frequency from 1MHz to 10MHz with an output power up to 120watts. Each channel has
its own programmable high voltage generator and delay control and so it provides a perfect solution for
applications with accurate focus control. For linear or annular array focus, apodization may need to be
implemented to each channel in additional to time delay control.
BSN-10 utilizes FGPA to generate PWM burst for each channel to control the power output up to
15watts per channel. The PWM has an adjustable PRF from 10 to 1000Hz.
BSN-10 has a 8.1’’ touch screen use interface and through which, PRF, duty factor or pulse number in a
burst, transmit voltage and delay for each channel, and transmit time can be programmed.
The system is designed for both of thermal and cavitation applications. For thermal application, a high
duty factor, or a long burst is required in each transmit with a lower transmit voltage. But for cavitation
application such as to break the fat cell or DNA/RNA molecules, a very high voltage ( >1000V), but a
lower duty factor is required. The high voltage for each channel is from 15 to 100V, and a transformer in
the class-D amplifier is used to boost the final output transmit voltage on load. The turn ratio of the
transformer can be predefined in factory before shipment. A L-C resonant circuit in series with
transducer can be used to provide resonance, i.e, converts the square wave to sinusoidal wave to
reduce harmonics. You may choose to short this circuit if harmonics is not an issue to your application
and in this way, more transducers with different frequency can be supported.
Two parameters are