The portfolio of Voltage Controlled Oscillators (VCOs) from ON Semiconductor includes high-performance Phase Locked Loop devices, including two-phase comparators, a voltage-controlled oscillator, source follower, and Zener diode, and VCOs that require a parallel tank circuit, including the inductor and capacitor. The ideal performance characteristics and features of the VCOs include diode protection on all inputs, wide operating voltage range for VCO, low power consumption, low input current, low quiescent current, high noise immunity, and ESD protection. The VCOs are compliant with the requirements defined by JEDEC Standard No. 7 A. Applications include FM and FSK modulation and demodulation, frequency synthesis and multiplication, frequency discrimination, tone decoding, data synchronization and conditioning, voltage-to-frequency conversion, and motor speed control.