CRBV55CL-0805-0900

VCOs (Voltage Controlled Oscillators) are widely used in different applications, ranging from mobile communication to military and industrial applications, due to their excellent performance in frequency control. CRBV55CL-0805-0900 is one of the most popular VCOs. This article will provide an overview of its application field and working principle.

The CRBV55CL-0805-0900 is a voltage-controlled oscillator (VCO) designed to operate in the frequency range of 55 MHz to 900 MHz and generate signals up to + 7dBm while providing linear tuning performance. It features an internal temperature-compensating voltage regulator and a low-noise amplifier, making it an ideal component for low-power, small-size applications that require "no-tune" operation. The high-side injection scheme enables for a small chip size and low power dissipation. The CRBV55CL-0805-0900 is available in a 3.2 x 3.2 x 0.5mm package and is ideal for use in hand-held, portable and vehicular applications.

The working principle of the CRBV55CL-0805-0900 is based on the injection locking technique. It locks the frequency of the oscillator to the frequency of an external reference source, while ensuring a clean signal with low phase noise. The oscillator is built on a voltage-controlled ring oscillator topology, where the different stages, such as the one shown in Fig. 1, are connected together in a ring. The VCO is driven by switching the states of several flip-flops arranged in a ring. The oscillator is then driven by the external reference source, which adds a beat to the output of the oscillator, causing the phase of the oscillator to lock to the phase of the reference source. This injection of beats increases the power of the output signal, resulting in the VCO output frequency tracking the input reference frequency. The injection locking technique can be used to accurately and precisely control the frequency of the oscillator, thus providing flawless tuning performance.

In summary, the CRBV55CL-0805-0900 is a versatile, low-power voltage controlled oscillator with excellent frequency control, allowing for precise tuning performance. It is particularly well-suited for hand-held, portable and vehicular applications where small size and low power consumption are important considerations. The oscillator is based on the injection locking technique and the high-side injection scheme ensures a compact size and low power dissipation.