Matsusada AMPS Series, Инструкция по эксплуатации

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4
Capacitive Load
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
(0.1μF) to 1kΩ (1000pF) in series to output. Please also note that with capacitive load the
bandwidth is limited according to the formula below.
Frequency Response
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, and 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.
Rise Time (step responsibility)
Responsibility can be indicated with rise time. (fig.2) Usually the rise time of amplifier of
responsibility (= bandwidth) fc (Hz) is given by a formula below.
tr ≒ 0.35/fc
The rise time tf is equals to tr.
1 Introduction
100％
DC
0dB
3dB
0.01fc 0.1fc 0.5fc fc
f(Hz)
70％
92％
0
Output swing
→
(Vpp)
Frequency ratio against fc →
(fig.1) Declination of output swing by
frequency
Vcon-in
90％
100％
ｔｆ
ｔｒ
10％ 0％ 0％
HVout
(fig.2)