Hittite has introduced a new line of SMT packaged PLLs with integrated voltage controlled oscillators (VCOs) which are designed for microwave radio, military, industrial sensors and test and measurement applications from 7,3 GHz to 13,4 GHz. The HMC764LP6CE, HMC765LP6CE, HMC783LP6CE and HMC807LP6CE are SiGe BiCMOS PLL RFICs which also include an advanced fractional-N synthesiser in a 6 x 6 mm QFN plastic package. The PLL/synthesiser section incorporates a cycle slip prevention (CSP) mode, which essentially holds the PFD gain at maximum until the frequency difference is near zero, reducing the time to arrive at the new frequency by 50%. A high-frequency reference path allows the use of references up to 220 MHz, while source buffers in the reference path support both square wave and 50 Ω sinusoidal reference oscillators.
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