Holzworth Instrumentation offers the HSM Series of RF synthesizer modules designed as building blocks for system integration applications where foundational performance is critical. These synthesizers are able to produce true phase coherency and industry leading channel-to-channel stability when integrated as multiple units.
Planar Monolithics Industries (PMI) offers a full line of Digitally Tuned Oscillators (DTOs) including Dielectric Resonator Oscillators (DROs), Voltage Controlled Oscillators (VCOs), and Frequency Synthesizers covering various frequencies in the 50 MHz to 40 GHz range. All models utilize the latest internal digital calibration techniques that minimize frequency drift over the operating temperature range, and offer fast switching speeds and stable frequency outputs with low phase noise.
The PE97640 from Peregrine Semiconductor is a delta-sigma, modulated fractional-N synthesizer optimized for frequency synthesis up to 5 GHZ in commercial space applications. With a 5/6 or 10/11 dual modulus prescaler, counters, a delta sigma modulator, a phase comparator, and charge pump, the device is optimized for superior phase noise performance, radiation tolerance, and high frequency selectivity.