BUY LM2917N https://www.utsource.net/itm/p/465195.html
LM2907/LM2917 Frequency to Voltage Converter
The LM2917N is a dual voltage-controlled oscillator (VCO) designed for use in FM radio applications. It is available in a 14-pin DIP package. Features: Wide operating voltage range: 2.7V to 15V Low current consumption: 4.5mA Low-noise operation High frequency stability Low temperature drift Low distortion High linearity Applications: FM radio Communication systems Automotive systems Security systems Industrial control systems Medical equipment (For reference only)