Matsusada Precision is a leading company in high-voltage power supply. As a comprehensive power supply manufacturer, products of Matsusada Precision have advantages in size, performance, and reliability.
Maximum slew rate 1200V/μs ! High speed high voltage/large current amplifier
AMPS series is an ultra-high speed high voltage amplifier. It realized high voltage output of ±20kHz and very high slew rate 1200V/μs. The large current type of peak current 4A is also selectable.
±10kV output model and ±20kV output model achieved the conventional double high-speed response of slew rate 1200V/μs. Laser modulation and beam deflection at unprecedented high speed are possible.
Frequency bandwidth with actual load is as high as 100kHz, and solve the problem of “When actual operation with load, the response become slow.” Ideal for higher speed printer or material evaluation testing.
When the voltage at load is lower than the rated maximum output of AMPS series, constant voltage and high speed operation is possible by sinking the output current with current sink feature. As example of the development of ceramic and electrophotography process, by current sink, it is possible to absorb the voltage of a capacitive load quickly or to perform diselectrification smoothly. And, because of double peak current of rated current in DC output, particularly, rise characteristics for the capacitive load can be improved.
Response of Matsusada amplifiers are described as "Frequency bandwidth". When swing the output with sinusoidal waveform with
rated resistive load, output swing(amplitude)is reduced as input frequency become faster. Frequency response in the specification is frequency fc is where
output swing is 90% approx.(-1dB).(fig.1)
In case clear output waveform is required, please select a HV amplifier which has high enough frequency bandwidth against required frequency. In general 3 to 5 times more frequency bandwidth for sinusoidal waveform, about 10 times more for rectangular waveform, is required. In case of insufficient frequency bandwidth the output swing shall be reduced, and also the phase difference be large, so some solutions, such as monitoring output waveform, shall be required.
Step response can be indicated with rise time.(fig.2) Usually the rise time of amplifier of response(=bandwidth) fc(Hz) is givin
by a formula below.
tr ≒ 0.35 ／ fc
The fall time tf is equals to tr.
The responsiveness of our high speed amplifier is determined with slew rate(SR). The step responsibility of our amplifier is as
shown in fig.3.
SR = 1200V ／ μs In case of output amplitude is smaller the response time become shorter.
When operated with a capacitive load of more than 100pF(including floating capacity of output cable), the output might oscillate. In such a case put a high voltage resister of 100Ω(1000pF) in series to output. Please also note that with capacitive load the bandwidth is limited according to the formula of right note. In case of corona discharge, larger current than rating can draw and night damage power supply. In this case too place an output resister to limit the current as same as in case of with capacitive load.