HCM4920000000AHJT

Crystals

The HCM4920000000AHJT is a type of crystal used in many different applications. It is a piezoelectric quartz crystal which has an inverted cone shape, similar to a microphone diaphragm. This crystal is used for its low noise, high frequency stability, low power consumption and wide frequency range in a variety of applications.

Application Field

The HCM4920000000AHJT has several applications in different fields. It is used in medical imaging devices of MRI, CT and X-ray machines, and in other medical equipment like ultrasonic imaging and surgical tools. It is also used in telecommunications, computers and consumer electronics. It is used in GPS systems, digital cameras, DVD players, televisions and other consumer electronics devices. It is also used in the aviation industry, such as aircraft navigation systems and autopilot systems. It is used in military systems and other industrial applications.

Working Principle

The crystal works on the principle of piezoelectricity. This property occurs when an applied electric field causes a change in the piezoelectric material, such as quartz, and vice versa. The piezoelectric effect causes a voltage to be generated when the material is subjected to mechanical stress. Conversely, when a voltage is applied to the material, its shape is deformed. This change in the material\'s physical shape creates a mechanical vibration, which is tuned to a specific frequency. It is this frequency that is used in different applications.

The HCM4920000000AHJT uses a special construction that allows its fundamental frequency of operation to be accurately and reliably tuned. It is composed of two layers of PZT-bodies, an upper and a lower, with a diameter of 4.9mm and a thickness of just 0.007 inches (0.17mm). The two layers are electrically connected in parallel and form the two halves of a vibration-mode crystal. This special construction ensures crystal frequencies that are extremely stable over a wide temperature range.

HCM4920000000AHJT crystal also includes a temperature compensation feature. This feature is used to ensure that the crystal can be used in high temperature ranging environment without any significant frequency shift. This is achieved by using a specific combination of PZT material and metal electrodes, which compensate the temperature effects.

The crystal is tuned to match a specific frequency, depending on the individual application. This frequency can be adjusted by controlling the voltage and current of the applied electric field. The frequency can also be adjusted by controlling the temperature, as the thermal coefficient of quartz crystals can be used to fine-tune the crystal’s frequency. The oscillator circuit, which is connected to the crystal, is kept in oscillation by the crystal’s vibration, thus ensuring a continuous output frequency.

The HCM4920000000AHJT crystal has a wide range of applications due to its low noise, high frequency stability, low power consumption, temperature compensation and wide frequency range. It is used in medical imaging devices, telecommunications, computers, consumer electronics, GPS systems, military systems and other industrial applications. The crystal is tuned to match a specific frequency and the oscillator circuit is kept in oscillation by the crystal’s vibration, thus ensuring a continuous output frequency.