QTC (Charge-to-Time module) infos

• Super-K Outer Detector TDC Front End (Ed Kearns, Super-K group at Boston University, 11/1995):
  specification of the QTC module, developed by BU group for the Super-K Outer Detector.

• QTC Replacement Manual (87kB ps), 1/1/2001 [superk password required].

• Schematics and layout diagrams:
  • Schematics of QTC Daughter Card
  • Schmatics of the QTC motherboard: sheet 1, sheet 2, sheet 3, sheet 4, sheet 5.
  • Schematics of Input Adapter Card
  • Layout of QTC Daughter Card
    
  • Layout of QTC motherboard with user access items colorized:

    Input/Output Connectors:
    J1	32x1-pin header, front	analog input signals (from PMTs): pin 1 (top) = Signal Channel 1 pin 2 = Ground Channel 1 pin 3 = Signal Channel 2 pin 4 = Ground Channel 2   : pin 32 (bottom) = Ground Channel 16
    J2	17x2-pin header, front	digital output signals (dECL): pins 1/2 (top) = +/- output channel 1 pins 3/4 = +/- output channel 2   : pins 31/32 = +/- output channel 16 pins 33/34 (bottom) = not connected
    J3	LEMO, front	Test Input
    J4	LEMO, front	Hitsum Output
    J5	LEMO, front	Hitsum Output (same as J4)
    J28	LEMO, rear	Veto Input
    TP1	testpoint, rear	testpoint for pot R5: "VTH" (Input Threshold Voltage)
    TP2	testpoint, rear	Ground testpoint
    TP3	testpoint, rear	testpoint for pot R7: "GATE_ADJ" (Gate Adjustment)
    Adjustment Potentiometers:
    R5	potentiometer, rear	adjust "VTH" (Input Theshold Voltage) 0 ... -140mV
    R7	potentiometer, rear	adjust "GATE_ADJ" (Gate Setting) -2.5V ... +2.5V
    Power Supply
    J29	NIM connector, rear	NIM power supply connector +/-6V, +/-12V, +/-24V
    Daughter Card Locations:
    DC1-DC16	special sockets, on-board	16 QTC daughter cards = one add-on card for each channel. note: the test module contains only 4 daugthercards: DC1, DC3, DC5, and DC7.

• Data sheets of semiconductors used with the QTC:
  • Analog Devices AD9696: Ultrafast TTL Comparator.
  • Burr-Brown OPA621: Wideband Precision Operational Amplifier.
  • Data Delay Devices Series 1513: Fixed SIP Delay Line.
  • Diodes Incorporated LLSD103: Surface Mount Schottky Barrier Diode.
  • Harris/Intersil HA-5002: High Slew Rate, High Output Current Buffer
  • Harris/Intersil HFA1112: Low Distortion Programmable Gain Buffer Amplifier.
  • LeCroy MQT200: Charge-to-Time Converter [note: no longer in production].
  • LeCroy MQT300A: Charge-to-Time Converter [this is the newer version offered by LeCroy].
  • Motorola MC10H124: Quad TTL-to-MECL Translator.
  • National Semiconductor LF441: Low Power JFET Input Operational Amplifier.
  • National Semiconductor LM317: 3-Terminal Adjustable Voltage Regulator.
  • National Semiconductor LM337: 3-Terminal Adustable Negative Voltage Regulator.
  • National/Fairchild Semiconductor MM74HC221A: Dual Monostable Multivribrator.
  • Texas Instruments 74ACT11074: Dual D-Type Flip-Flop With Clear And Preset.
  • Texas Instruments 74AC11241: Octal Buffers/Line Drivers With 3-State Outputs.