Hittite Microwave has released eight new MMIC voltage controlled oscillators (VCOs) that cover wireless infrastructure, test equipment, microwave radio and military applications between 2 and 6,8 GHz. This addition complements the existing standard product line and expands it to cover from 2 to 15 GHz.
The MMIC VCOs integrate the resonator structure,negative resistance circuitry, tuning varactor and output buffer amplifier, thus requiring no external components. The inherent accuracy and repeatability of MMIC wafer processing coupled with automated IC assembly results in a VCO product that is smaller, more reliable and more consistent than a traditional hybrid VCO.
Output signals are delivered at power levels between +3,5 to +5,0 dBm typical from model to model. Both the 10 and 100 kHz single sideband (SSB) phase noise performance is competitive with comparable hybrid VCO products with levels as good as -89 dBc/Hz and -115 dBc/Hz respectively, according to the manufacturer. The frequency drift rate of the MMIC VCO products range between 0,25 to 0,8 MHz/°C from model to model.
Hittite also offers custom-designed MMIC VCOs and complete synthesizer modules for specific customer requirements. Although the standard product line consists of 15 VCOs, Hittite has designed many MMIC VCO custom products from 2 to 80 GHz. VCO customisation includes the addition of dividers, larger output buffers or design of complete Phase Locked Oscillator (PLO) circuits on a single chip.
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