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PVX-4140

±3,500V PULSE GENERATOR

Directed Energy, Inc. An IXYS Company 

THE PULSE OF THE FUTURE

PVX-4140

±3,500V PULSE GENERATOR

• 0 to ±3500V Pulse Output

• ≤25ns Rise And Fall Times

• ≤60ns to DC Pulse Width

• >30KHz Pulse Repetition Frequency

• Optimized To Drive Deflection Plates,

Grids, Pockels Cells And Other

Capacitive Loads

• Protected Against Arcs, Shorts And

Load Transients

• Voltage And Current Monitor Outputs

The PVX-4140 pulse generator produces fast, high volt-

age wave forms to 3,500V. Optimized for high impedance

capacitive loads, the PVX-4140 is well suited for driving

extraction grids and deflection plates for electrostatic

modulation of particle beams in time-of-flight mass spec-

trometers and accelerators. Its robust and versatile design

also makes it well suited for pulsing or gating power tube

grids, Pockels cells and Q Switches, acoustic transducers,

microchannel plates, photomultiplier tubes and image in-

tensifiers. The exceptional pulse fidelity of the PVX-4140

will optimize the performance of any system in which it is

used.

The PVX-4140 generates an output voltage pulse of 3,500

volts with rise and fall times of 25ns or less, with very flat

voltage pulses to DC into a capacitive load. It can gener-

ate singled-ended output pulses from ground to +3500V or

from ground to –3500V, and can also generate pulses

originating from a DC voltage offset from ground by using

both VLow and VHigh power supply inputs. This offset can

be from –3500V to +3500V, with a maximum power supply

voltage differential of ≤3500V.

The PVX-4140 requires a user-supplied TTL gate signal, a

high voltage DC power supply and optional DC offset sup-

ply inputs. The output pulse width and frequency are con-

trolled by the gate signal. The pulse output voltage is con-

trolled by the amplitude of the input DC power supplies.

is connected to the output. Therefore the PVX-4140 can be

used to generate a negative-going pulse by logically

inverting the input gate, so that the input gate is high until

the unit is pulsed. When the input gate goes low, the VLOW

input supply is connected to the output, thereby generating

a negative-going pulse.

The PVX-4140 features front panel indicator LEDs to moni-

tor the status of the pulse generator. Front panel instru-

ment-quality voltage and current monitors provide a

straightforward means to view the output voltage and cur-

rent waveforms in real-time, eliminating the need for an ex-

ternal high voltage oscilloscope probe.

The pulse generator is a direct-coupled, air-cooled solid-

state half-bridge (totem pole) design, offering equally fast

pulse rise and fall times, low power dissipation, and virtually

no over-shoot, under-shoot or ringing. It has over-current

detection and shut-down circuitry to protect the pulse gen-

erator from potential damage due to arcs and shorts in the

load or interconnect cable. All control and protection logic

circuitry, support power, energy storage and output network

are incorporated into the PVX-4140. It can be connected

directly to the load, and does not require series or shunt

resistors, impedance-matching networks between the

pulser and the load, or additional energy storage (capacitor

banks). All of this is taken care of within the PVX-4140.

When the input gate is high, the VHIGH supply is connected

to the output. When the input gate is low, the VLOW supply

DIRECTED

ENERGY

INCORPORATED

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