![background image](http://html1.mh-extra.com/html/avtech/avrq-5-b/avrq-5-b_instructions-manual_3034555044.webp)
The next illustration shows a similar glitch occurring for a negative high-voltage pulse,
where the input has been biased “on” to provide a normally-zero output voltage:
CONTROLLING THE TRANSITION TIME
The positive and negative pulse generators in the AVRQ-5-B are basically switched
current sources. The voltage rise time can be controlled by deliberately soldering
capacitance between the two “CAP” pads on the daughterboards (between the GND1
and GND2 signals). This capacitance should be added using high-voltage (> 2 kV)
ceramic capacitors. Factory tests are conducted using Vishay Cera-Mite 564R-series
capacitors, which are readily available for purchase from Newark. Some of the tests
below use series or parallel combinations of part number 564R30GAT15, which is a
150 pF / 3 kV capacitor:
http://www.newark.com/vishay-sprague/564r30gat15/ceramic-
capacitor-150pf-3000v/dp/69K5347
.
The photo below shows a 564R30GAT15 capacitor installed:
44
HV PULSE
AMP1,
-1.5 kV
RISE TIME,
VARIABLE
LOGIC OUT
V
CC
(AMP2),
+3V TO +43V
GLITCH CAUSED BY
INADEQUATE COMMON
MODE TRANSIENT
IMMUNITY (CMTI)
Содержание AVRQ-5-B
Страница 52: ...Bottom side 52 ...
Страница 56: ...Top side Bottom side A P6246 differential probe was used to observe the logic outputs in the TLP2366 tests 56 ...
Страница 57: ...PCB 299B FOR ADUM241E0BRWZ 57 ...
Страница 82: ...PCB 158R2 LOW VOLTAGE POWER SUPPLY ...
Страница 87: ...DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267C ...
Страница 88: ...DUT WIRING ON CUSTOMIZED TLP2366 DAUGHTERBOARD PCB 298B ...
Страница 89: ...DUT WIRING ON CUSTOMIZED ADUM241E0BRWZ DAUGHTERBOARD PCB 299B ...
Страница 91: ...PERFORMANCE CHECK SHEET 91 ...