Hittite Microwave Corp. has released two SMT-packaged MMIC voltage-controlled oscillators (VCOs) with integrated buffer amplifiers. Complementing the supplier's existing line of monolithic VCOs, the new members are designed for high power output and require no external components.

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While the HMC505LP4 covers 6.8 to 7.4 GHz and delivers +11 dBm of output power with a single side band (SSB) phase noise of -106 dBc/Hz at 100 kHz offset, the HMC506LP4 covers 7.8 to 8.7 GHz and offers +14 dBm output power with a SSB phase noise of -103 dBc/Hz at 100 KHz offset. Both VCOs operate from a single +3 V supply and integrate the varactor, negative resistance circuit, resonator and buffer amplifier on a single HBT MMIC.

Each product is housed in a standard 4 mm x 4 mm QFN SMT plastic package with identical PCB assignments. Samples and evaluation PC boards are available from stock and can be ordered on line.