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Frequency-to-voltage converter

LM2907-N Internal Circuitry

Explore the internal circuitry and functional stages of LM2907-N.

Package view

Inside LM2907-N

Ground-crossing input, charge pump and buffered output.

Compact eight-pin LM2907 functional cutaway with input comparator, pump, internal positive-input connection and transistor output.
Functional architecture of the selected eight-pin LM2907; the resistor and capacitors are external.

Explore the circuit

Select a stage to see its role and connections

Recognize each half cycle

The input comparator changes state when the input passes its positive or negative threshold.

Accumulate the charge

Both half-cycle currents contribute to the average at CP2.

Drive the output

The amplifier drives a transistor with separate collector and emitter terminals.

Component view