What is the EMS series oscillator theory of operation?
An EMS series oscillator consists of a MEMS resonator and a programmable integrated circuit. The memory contains programmable functions that control the operating characteristics of the device (i.e. output frequency, modulation frequency, output frequency spread spectrum percentage, power down, tri-state, spread disable and duty cycle). At the heart of an EMS series oscillator is a programmable high resolution PLL (Phase Locked Loop as shown in Figure 3). The PLL consists of a reference counter divider, a feedback counter multiplier, spread spectrum modulation signal, and an output divider. Utilizing a proprietary design and an exclusive programming methodology, the EMS series oscillators are programmed with specific values that define the operating characteristics of the oscillator.
