Next: The sampling clock generator Up: Digital Control Circuitry Previous: The bias current sources
Next: The sampling clock generator
Up: Digital Control Circuitry
Previous: The bias current sources
The control voltage sources are generated by DACs with a resolution
of 7 bits (Helix128-2/2.1) resp. 8 bits (Helix128-2.2/2.3), working from
rail to rail (i.e. from -2 V to +2 V); the slope provided is
31 mV/LSB (Helix128-2/2.1) resp. 15 mV/LSB (Helix128-2.2/2.3).
The voltage DACs are controlled by the
registers of the same name with the LSBs of the 8 bit wide registers
ignored (Helix128-2/2.1).
A register setting of 0 corresponds to an output voltage of -2V.