ECOTEST DKG-21 Operating Manual page 23

Buttons MODE and THRESHOLD serve to switch on the dosimeter, set the
required mode of operation and program threshold levels of audible alarm.
CCS is implemented on an application-specific integrated circuit and
provides SB charging and indication of charging process and its completion.
Additional radioelements protect CCS from power surges and impulse noise.
VSC is implemented under a circuit of pulsed voltage converter with an
additional linear voltage stabilizer (LVS) and ensures formation of stable
voltage to supply power to all nodes of the dosimeter.
DPC is implemented on the basis of a special-purpose processor and is used
to control the operating modes of the dosimeter, control the anode voltage
former, digital processing of pulse sequences from the ionizing radiation
detector, generate signals that control dLCD, and display signs of measurement
modes.
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