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How are the internal reference voltages provided?

Latest Updated:09/01/2007

Question:

How are the internal reference voltages provided?

Answer:

As shown in the figure, the control voltage and trigger reference voltage are obtained by resistance division.
The resistance value is 200 kΩ x 3 for the uPD5555 and uPD5556, and the relative precision is about 2 to 3% (reference values).

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