Detector Lamp Supply Board (Fll) - Agilent Technologies 1100 Series Reference Manual

Detector Lamp Supply Board (FLL)

Lamp Voltage
Ground
Trigger Voltage
Trigger Control
Figure 93
Lamp Energy Capacitors
The lamp high voltage circuit of the FLF board is used to charge the 4 energy
capacitors of the FLL board. The energy per flash depends on the applied
charging voltage (1/2*C*U
backflowing current from generating negative lamp discharge currents which
may damage the flash lamp.
Lamp Ignition Control
An ignition voltage is switched by a thyristor to the TriggerPac ignition
transformer to built a small ionized channel (refer
Lamp"
again to prevent lamp damage.
1100 Series FD Reference Manual
FLL Board
Lamp Energy
Capacitor
Lamp Ignition
Control
Block Diagram FLL Board
2
on page 270). A freewheeling diode forces the thyristor to switch off
). A power diode freewheeling circuit prevents the
Theory of Operation
Trigger Xenon Flash
Pac Lamp
"Igniting the Flash
8
273