M55181/1-03

M55181/1-03 is a frequency synthesizer developed by Murata. This device is applicable in a variety of applications, as it provides stable, highly-precise, low-power consumption, immunity to environmental interference and low-high temperature operation. It is widely used in radio equipment, digital radio communication and wireless devices, such as communication base stations, mobile phones and handheld units. It is also suitable for other applications in applied electronics, such as frequency allocation, antenna matching, and signal testing.

This device integrates a loop filter, a voltage-controlled oscillator (VCO) and a frequency divider into a single package. The frequency of the synthesizer is generated by a VCO based on a digital frequency word generated by the frequency divider. The output frequency is controlled by an external analog voltage signal applied to the tuning input pin. This voltage control allows the output frequency to be tuned to the desired frequency over a wide bandwidth of up to 16 kHz.

The working principle of the M55181/1-03 is based on a voltage control oscillator (VCO), which is a device that generates a frequency that is proportional to the input voltage. The VCO generates a frequency that is linearly proportional to the input control voltage and is then sent out to the frequency divider circuit. This VCO is used to generate a range of frequencies with good linearity over a specified voltage range. The frequency divider then divides the incoming frequency down to a lower frequency that can be used as the output frequency.

In order to maintain a good linearity over the entire range of frequencies, the VCO must be properly tuned. This adjustment is done through the loop filter, which determines the value of the frequency step size. The loop filter is a circuit that contains a combination of an operational amplifier, capacitors, and resistors. The filter is used to limit the values of the error voltage that are generated in the VCO. The tuned loop can be used to ensure that the frequency output remains stable and within the specified range.

The M55181/1-03 device is most commonly used in the radio frequency range. This range is typically from about 20kHz to 500kHz, making it ideal for applications such as cellular radios, wireless data links, and digital televisions. The device is very useful in these applications as it provides a good level of accuracy while also being very energy efficient.