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The guides below list, by application, DEI products that are
designed to meet the specific requirements typical of these
applications:
High Voltage Time-Of-Flight Pulse Generators
Pulsed I-V,
Semiconductor & Component Testing
These pulse generators modular pulsers are designed to drive capacitive loads such
as deflection plates and extraction grids. When applied to these
elements in a time-of-flight mass spectroscopy instrument or a
linear accelerator, these pulses can be used for electron or ion
beam steering, gating, deflection, or extraction.
In addition to time-of-flight
and linear accelerator applications, these pulsers can be used to
drive any high impedance, capacitive load, including:
- Pockels cells and
Q switches in LASER systems;
- Microchannel
plates;
- Photomultiplier
tubes;
- Control grids of
power vacuum tubes;
- Acoustic
transducers
Additional information
on the GRX and PVM pulse generator models can be found on the PVX And
PVM Pulse Generator Overview Page.
DEI's modular and OEM
pulse generators and pulser modules are designed as compact,
economical high performance pulse generators for use in
spectrometers, accelerators, radar transmitters and other
equipment and instruments requiring high voltage, precision
voltage pulses. Their versatile design also makes them well
suited for use in laboratory and test environments, in which a
benchtop or rack mount instrument may not be the optimum choice.
In addition to the
models shown below, DEI designs and manufactures custom and OEM
pulse generators, modulators and drivers designed to our customer's
specifications. Please contact DEI to discuss your specific
application requirements.
PVM-4140 (Rear), PVM-4150 & PVM-4210 (Front) Pulse Generator
Modules |
| Model |
Max.
Output
Voltage |
Rise
Time |
Pulse
Width |
Max.
Freq. |
Notes |
| PVM-4140 |
±3000V |
<25ns |
<60ns to DC |
>25KHz |
|
PVM-4150
|
±1500V |
<25ns |
<60ns to DC |
>75KHz |
|
PVM-4210
|
1900V Differential (Simultaneous +950V
and
-950V Outputs) |
<15ns |
<40ns to DC |
>20KHz |
Dual Differential (+ and -) Outputs,
Internal HV DC Power Supplies |
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These pulse generators provide
very fast rise and fall times, and narrow pulse widths. They are
designed to drive 50 Ohm loads, however they can drive high
impedance loads (deflection plates, grids, etc.) or low impedance
loads such as laser diode drivers. This can often be accomplished
through the use of either a shunt resistor, a series resistor, or
both. This is discussed in detail in the application note "Driving
Capacitive Loads With The HV1000 Pulser."
Specific uses of these products
include:
- Driving deflection plates
and grids in time-of-flight mass spectroscopy;
- Pulsed testing and
characterization of electronic components, including
diodes, transient voltage protectors and resistors;
- Calibration of high voltage
probes;
- Driving acoustic
transducers for sonar, non-destructive testing, and other
test and measurement applications;
- Driving photomultiplier
tubes;
- Driving microchannel plates;
- Modulating electron beams
HV1000
Pulse Generator |
| Model |
Max.
Output
Voltage |
Rise
Time |
Pulse
Width |
Max.
Freq. |
Notes |
| HV1000 |
850V |
<10ns |
50ns to 10µs |
1MHz (5MHz burst) |
Modular Pulse Generator |
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The I-V characteristics
of semiconductor devices are functions of frequency and
temperature. Curve tracers and other "DC" test systems
typically step through a range of gate voltages and, at each gate
voltage, sweep the drain voltage over the measurement range. The
device essentially reaches thermal equilibrium and electronic (semiconductor-trap)
equilibrium at each point, yielding different test
characteristics than actual RF operational characteristics.
By pulsing the device
using a pulse generator and taking a measurement during the pulse,
the measurements can be taken before the device heats up. This
circumvents the thermal effects associated with conventional
"DC" testing, more closely approximates the
characteristics of the device when operating at high frequencies,
and doesn't activate the semiconductor "traps".
The design of these
pulse generators provide fast rise and fall times, with minimal
overshoot, undershoot and ringing. These controlled voltage
waveforms allow the device under test (DUT) to stabilize at
voltage within a few hundred nanoseconds, allowing I-V
measurements to be made before device heating begins. The PVX-2505 features
instrument-quality voltage and current monitors, providing a straight-forward
means of measuring the voltage and current ofthe device under test.
The PDG-2510 is a precision digital delay and general purpose
pulse generator providing two output channels, each with independently
adjustable delay and pulse width, plus a Sync (T0) output. The accuracy,
precision and flexibility of the PDG-2510 makes it well suited for use in laser
timing, automated testing and precision pulse applications. In laser timing
applications, the Sync (T0) output is used to trigger the pulsed laser and set
the system’s repetition frequency. Delayed output 1 controls the laser
Q-Switch, and output 2 can be used to synchronize other elements in the system,
such as a detector or data acquisition hardware.
The PDG-2510 is ideal
for gating and triggering DEI's high voltage pulse generators,
pulsers and laser diode drivers.
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