Temperature frequency converter electronic circuit
The figure shows the electronic circuit diagram of the temperature frequency converter. In this circuit, LM331 is a cost-effective integrated chip produced by American NS Company. Can be used as a precision frequency voltage (F / V) converter, A / D converter, linear frequency modulation and demodulation, long-term integrator and other related devices. The chip is an in-line 8-pin chip. The LM331 has 1. input comparison circuit; 2. timing comparison circuit; 3. RS trigger circuit; 4. complex 0 transistor; 5. output drive tube; 6. bandgap reference circuit; 7. precision current source circuit; Switch; 9. Output protection point circuit and other parts. The output tube is in the form of an open collector. The voltage range is 4~40V, and the output is also up to 40V.
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