Bias Card

• Bias Card firmware
• Bias Card low noise bias lines noise analysis
• Bias Card RevD to RevF changes

Schematics

• Technical description [PDF] (obsolete)
• Block diagram [PDF] (obsolete)
• Rev.D6 schematic [PDF] (Original design)
• Rev.D7/8 schematic [PDF] (High-current det_bias)
• Rev.D11 schematic [PDF] (High-current det_bias/no heater)
• Rev.E0 schematic [PDF] (Multiple det_bias lines)
• Rev.F0 schematic [PDF] (Multi det_bias & MHz-response bias lines; Low-noise bias lines turned off)
• Rev.F1 schematic [PDF] (Power turned off on ln_bias)
• Rev.F2 schematic [PDF] (Minor change in ln_bias circuit)
• Rev.F3 schematic [PDF] (low 1/f-noise opamp for channel 0-15)
• Rev.F4 schematic [PDF] (low 1/f-noise opamp for channel 15-31)