Work Microwave Phase-Locked Oscillator with internal TCXO, 125 – 2500 MHz

WORK phase-locked oscillator products are rugged modular components that can be used in a wide variety of applications. The phase-locked oscillators have found their way into every type of high quality telecommunications, lab testing, satellite up- and downconverters, radar and many other applications that require the high quality and performance that we design into our products.

The phase locked oscillator design begins by defining the performance parameters required. The most significant of these requirements is usually associated with the frequency band and frequency resolution. Next would be performance requirements such as phase noise, spurious, harmonics, reference, operating voltage and power consumption. These are all factors that must be considered before choosing a phaselocked oscillator design. Phase noise requirements and contributions of either an internal or externally supplied reference will usually dominate the choice or type of design required, followed by frequency resolution. If the output frequency maintains integer multiples of the reference frequency, a simple single analog loop can be applied. If the reference noise is not adequate when multiplied to the output or if the output frequency is not an integer multiple of the reference frequency, we would need to either use a single loop digital approach or introduce a multi-loop design.

Single loop analog designs are preferred due to the very low noise floor the analog phase detector can provide. Generally this noise can be below -160 dBc. In most cases this will do very little to degrade a good reference frequency. The output noise will be degraded only by the frequency multiple of the reference to the output.

With the digital phase-locked loop, the reference frequency can be divided or fractionally divided to allow fine resolution of output frequency. The drawback to the digital loop is usually due to a poorer phase detector noise floor which will result in a higher output loop phase noise. The finer resolution will also adversely affect spurious performance. Digital single loop designs usually incorporate narrow loop bandwidths and higher quality VCO performance to offset these limitations.

The multiple loop design will allow us to utilize the best of the very low noise analog circuits along with digital and analog sub-loops to enable very fine frequency resolution and mask the noise contribution of the reference frequency. This mask effect of the reference noise is another strong attribute of the multiple loop design choice. Multiple loop phaselocked oscillators designed by WORK use a proprietary approach that allows extremely fine resolution without large N multiples that reference division will cause.

Features

• very low phase noise design

• high output level, typical +20dBm

• low spurious (typical <-90dBc) and harmonics

• high reference frequency suppression, typical -90dBc

• low power consumption <5W

• frequency stability < 10ppm over temperature and aging over 15 years

• wide operating temperature range -30°C … +70°C

Оptions

• lower power consumption <3.5W with less output level