CWX813-033.0M Crystals, Oscillators, Resonators

CWX813-033.0M oscillators are a series of frequency control devices used to generate precise frequency signals. The correct application of the oscillator is crucial to the consistent functioning of many electronic circuits. The principles of operations, selection criteria and potential applications of this particular series of oscillators are reviewed in this article.

Operating Principles of CWX813-033.0M Oscillators

The CWX813-033.0M series oscillators is a type of quartz-controlled crystal oscillator which uses a circuit composed of an active device, quartz crystals and a timing element to create an oscillatory signal with a predictable frequency.The internal circuitry of the oscillator relies on the fact that quartz crystals vibrate in a predictable manner when exposed to electrical and mechanical stimuli. The quartz crystal in the oscillator circuit is connected to an active device (transistor, FET, IC), wherein it is exposed to an alternating electric field. This causes the crystal to have mechanical distortions which produces vibrations at its resonant frequency. The oscillator circuit also contains a timing device, which is set to a fixed frequency, usually the nominal frequency of the quartz crystal. This frequency is greater than the resonant frequency of the quartz crystal. Through the active device, the crystal is exposed to a repeated square wave signal at the timing frequency, which causes the crystal to vibrate at its resonant frequency. The resultant signal is then amplified to obtain the desired output.

Selection Criteria and Applications of CWX813-033.0M Oscillators

Before selecting a quartz crystal oscillator for a specific application, it is necessary to consider the following parameters: the desired frequency range, the stability of the frequency, the environmental requirements and the life span of the oscillator. The CWX813-033.0M series oscillators are designed for frequencies between 20 and 40 MHz. The fundamental frequency stability is 0.08 ppm and the long-term frequency stability is 0.5 ppm. The operating temperatures range from -20°C to 70°C. In addition, the series oscillators have an average life span of 10 years.

The CWX813-033.0M oscillators are primarily used in precision frequency control circuits, where exact frequencies with low phase noise and low harmonic content are required. This series is particularly suitable for applications that require wide frequency range and extended temperature range operation parameters. The most common applications of CWX813-033.0M oscillators are in radio frequency (RF) systems, telecommunications networks, satellites, clocks, timers, counters and medical equipment.