Frequency Synthesizer

A frequency-selective frequency multiplier can be construct with a PLL system by inserting frequency divider inside the feedback between the phase detector input and the VCO output. Figure below shows the schematic diagram of low-frequency synthesizer with a programmable three decades divider circuit. The frequency-divider modulus N have value between 3 to 999 with single steps increment. In locked condition, […]

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PLL Oscillator for Medium Wave Frequency

What is a PLL oscillator? PLL stands for phase locked loop, and this means a control method by comparation of the controlled plant or system to a reference clock or oscillator, that the plant is controlled to synchronize the clock. PLL has been widely implemented in motor control application, to make the motor rotates at very precise speed, even at […]

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