Has anyone ever seen a circuit like this before? The emitter is tied to VCC.
Please note that the diode is a photo-diode, there is an emitter circuit but it is not shown. I am trying to copy a small circuit board from a defective IR receiver. There are no schematics and the company is long gone. I traced out the circuit paths and diode checked the transistor. I do not know the resistor value because that is what failed, I should be able to figure that out doing a little math. (The top blew off so I can not read the code, the entire thing is smt and on a board 2cm x 2cm.)
Can anyone help me?
Please note that the diode is a photo-diode, there is an emitter circuit but it is not shown. I am trying to copy a small circuit board from a defective IR receiver. There are no schematics and the company is long gone. I traced out the circuit paths and diode checked the transistor. I do not know the resistor value because that is what failed, I should be able to figure that out doing a little math. (The top blew off so I can not read the code, the entire thing is smt and on a board 2cm x 2cm.)
Can anyone help me?
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