D'U'T'

1
Polarity Protection
D.U.T.
()
1N5822 or 1N5817
Schottky diode
()
D.U.T.
1N4001
Standard rectifier -- fool proof
2
Over-voltage Protection
Fuse (eg. 1A)
1N5339 (eg. 5.6V) Parts shop 1N4734
3
Providing Power
Bench Supply
Agilent E3631A
BAD
GOOD
How much voltage provided? How much current
drawn? You cant limit current ?
You know the voltage. You know the current
drawn. You can limit current!!!
4
Devices

• D.U.T. Device Under Test
• Microprocessor (PIC, FPGA, DSP)
• Transmitter/Receiver
• Evaluation Board
• Anything expensive

5
Sensors

• Need to protect your circuit from a sensors
  output?
• Need to protect your sensor from the rest of your
  circuit?
• Use an op-amp to source large currents to or from
  a sensor.

Gain 1 (Rf / Rin)