A-303
High Voltage Amplifier/ Piezo Driver and Modulator
The A-303 piezo Driver/Piezo Amplifier is a high Voltage, high speed
Piezo Driver / Linear Amplifier combined with a wide band AM/FM modulator.
It was especially designed as a Linear Amplifier / Driver for PIEZO Electric
Actuators (also known as "Piezo Amplifier"), stacks,piezo sheets, bimorph elements
and other devices. It may be also used as a general purpose High
Voltage amplifier for Medical applications
(for example, as electode driver for Neurology).
The Piezo Driver / Piezo Amplifier is based on a high voltage, high frequency
and high current MOSFET amplifier which is capable of driving up to ±200V
(400V ptp) at ±200mA at frequencies from DC to 450 kHz.
By connecting 2 amplifiers in parallel or in series, the output voltage and
current may be doubled to 800Vptp @ 200mA or 400Vptp
@ 400mA.
The amplifier section is very stable and has a low noise output and a very low
electrical noise - Compare Our Specifications!
The built-in modulator (AM or FM) enables the user to
modulate the carrier frequency (adjusted on the front panel) by any input signal
at the range of ±10V. The modulator can be turned off and bypassed using the ON/OFF switch on the left side.
This High Slew Rate Amplifier / Driver can be used for Various applications
requesting high Slew Rate, High Voltage and fast response as:
Plasma Driver and Plasma Actuation, driver for piezo manipulator, Optical Switching
devices, closed loop feedback systems, vibration control, structural damping
analysis, Flow actuation and control etc.
Competitive Price!
Features:
High frequency amplifier - DC-1.2 MHz optional.
Very Low Electrical
Noise.
Low Distortion
No Audible Noise-you
may hear your experiment.
High Slew rate-up
to 1000 Volt/microsecond.
Input protection-High
Voltage, On/Off.
Output protection
- Short-circuit, Power loss,Impedance.
Built
in Modulator: 
Amplitude(AM) or Frequency(FM) modulation
High Frequency - up to 100 kHz.
Low distortion
Adjustable frequency, Gain, Offset
The modulator may be turned off and bypassed if not in use
(only amplifier section would work).
Amplitude and Frequency modulation
 |
Block Diagram
Specifications:
A-303 Piezo Amplifier and Modulator
*Sync output provides a square wave in the same phase and frequency of the modulator
output
(for synchronization and frequency measurement).
*The unit is self cooled - no fan or noisy parts.
| Amplifier section: | |
Maximum
Input Voltage |
± 12 V |
|---|---|
Maximum
Output Voltage |
± 200 V ptp |
Maximum
Current |
± 200 mA |
Bandwidth |
Into
1 K resistive load |
| DC to 450 kHz (-3 dB) (DC to 1.2 MHz-optional) | |
| Into Capacitive load : | |
| DC to 250 kHz (- 3 dB) (1 nF) | |
| DC to 25 kHz (- 3 dB) (10 nF) | |
| DC to 2.5 kHz (- 3 dB) (0.1 µF) | |
| DC to 250 Hz (-3 dB) (1 µF) | |
| DC to 25 Hz (-3 dB) (10 µF) | |
Output
Power |
40 Watt maximum |
DC
Gain |
20 (up to 50 optional) |
Coupling |
Input & Output: Direct DC Coupling |
DC
Offset |
Adjustable to ± 160 Volts (RTO)+ On/Off Switch |
Input
Impedance |
10
K |
Slew
Rate |
350V/ µSec (1000V/µSec optional) |
Output
Impedance |
4 |
Output
Noise (input shorted, 350 KHz. Bandwidth) |
5 mV PTP max. (1 mV RMS max.) |
Variable
Gain Option: |
0-10X
or 0 - 20X or 0-40X available. Please consult the factory regarding that option. |
Modulator
Section: |
|
Center
Frequency |
1 - 100 kHz adjustable |
Modulation |
Amplitude (AM) or Frequency (FM) |
Waveform |
Sine Wave |
Distortion |
0.05 % maximum |
Modulation
Input F.S. |
± 10 V |
Modulation
Input Impedance |
10
K |
Sync
Output |
1
V ptp, AC coupled,1 K Impedance |
Amplitude
Adjustment |
0.5 V ptp to 20 V ptp |
Offset
Adjustment |
± 10 V or 0 V fixed |
Modulator
output Impedance |
100 |
The modulator may be turned off |
|
AC
Input |
|
Line
Input Voltage |
110/120 V, 60 Hz or 220/230 V , 50 Hz |
Line
Input Current |
1.3 A peak |
| Options: | |
| 01- High Slew Rate | 1000V/µSec |
| 02-Higher Gain | Up to 50 |
| 03-Bandwidth | DC-1.2 MHz. |
| 04-Variable Gain | 0-10X or 0 - 20X - No Charge. |
 |
|
| Slew
Rate option 10V Step @ input 250V Step @ output |
Output
Noise - 1.2 MHz. Bandwidth option |
The Standard amplifier has very low noise. Noise level @ 350 KHz. BW, input shorted --> display set @ 2 mV/div. 10uS/div. Total noise is less than 1mV RMS ! |
|
Applications:
2 amplifiers can be connected in series or in parallel
in order to double the Output Voltage or Output Current.
Series connection (+/- 400V into a floating load = 800V ptp).
Please note that both amplifiers must be floating (i.e. be careful not to
ground them via an oscilloscope etc.)
It is also possible to double or tripple the output voltage by using a special
transformer. Using a transformer is possible only at
high frequency (over 10 KHz.) and it requires more components to be added for
balancing and proper termination of the load.
Parallel connection is done by adding resistors at the input and at the output.
Please consult the factory for parallel connection.
Calulating the estimated current needed to drive your load:
| In order to purchase the right amplifier to drive your load, you must calulate the peak current needed. | |||
| For Capacitive load: | |||
|
|||
| For Resistive Load: | |||
| I = Vpeak/R | |||
| where R is the resistance of your load in Ohms. | |||
The current, Voltage and Frequency must be less or equal to the amplifier's specifications.
A-303 Frequency Response:
This amplifier is NOT SUITABLE for driving pure inductive loads
(i.e. speakers, solenoides, electromagnets etc.)
You must connect your load with thick wires to minimize inductance (like speaker wires). Coaxial cable is not recommended for cables over 2m (6.5 Ft.) because the capacitance of the cable (15-50 pF/Ft) will load your amplifier at high frequencies.
| Example: The active impedance of a capacitive load is given by the equation: Z=1/(2*Pi*F*C) where Pi=3.1415, C in Farads, F in Hz.The user must check that under the peak operation Voltage, at maximum frequency, the current will not exceed 200mA (0.2A). Example: Operating Voltage is +/-150V, Maximum Frequency=10KHz. Load is 10nF. Z=1/(2*3.1415*10,000*10EE-9) =1592 Ohms. 150[V]/1592[Ohm] =94[mA] ===>The amplifier will drive that load at an amplitude of 150V (300V ptp). |
Fast shipping!!!
All amplifiers are available in stock. We ship within 1 working day after your credit card/wire transfer was approved. We use DHL for shipping. It takes up to 3 working days to ship by DHL to most countries.
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