Sources
Second-generation Integrated Circuit VCXOs and TCXOs
The 2GIC second-generation integrated circuit voltage-controlled crystal oscillators (VCXO) and temperature-compensated crystal oscillators (TCXO) offer CMOS- and TTL-compatible output waveforms and enable subminiature SMT packaging. Other features of the high performance IC include integrated automatic gain control (which ensures oscillator startup over a broad range of conditions), good rise and fall times, and frequency capability ranging up to 100 MHz. Both a 3.3 and a 5.0 V supply are available. A TriState output disable feature allows PCB auto testing.
Champion Technologies Inc.,
Franklin Park, IL
(800) 888-1499.
Phase-locked Oscillators
The PureSource phase-locked oscillators cover the 9 to 13 GHz frequency range. The oscillators exhibit good frequency stability and ultra-low phase noise performance for high speed digital radios and offer performance and extremely high reliability for demanding applications.
Microwave dB,
Newbury Park, CA
(805) 499-0410.
Small-footprint VCO
The model PVS 950 VCO for wireless applications operates over the 940 to 965 MHz frequency range with a power output of 9 dBm and a 5 V supply. Phase noise is -105 dBc/Hz at 10 kHz offset and -125 dBc/Hz at 100 kHz offset from center frequency. Operating temperature range is -40° to 85°C. Size: 0.3" x 0.3". The company also makes a surface-mount frequency synthesizer (model PSS-950) using the PVS 950 VCO that covers the same frequency with the same power output and phase noise. The footprint of that synthesizer measures 0.75" x 0.75".
Princeton Electronic Systems Inc. (PES),
Princeton, NJ
(609) 275-6500.
5.70 to 5.93 GHz VCO
The model RVCO-5700-5930-SM 0299 VCO covers the frequency range from 5.7 to 5.93 GHz. Supply voltage is 8 V (min). MS packages with offset traces or SM packages with the symmetrical traces are available for most frequencies. Custom requirements are available at no extra cost. Smaller packages are also available for some frequencies.
RADITEK,
San Jose, CA
(408) 266-7404.
Phase-locked Sources
The MDR5530 series phase-locked sources are internally referenced, phase-locked, dielectric resonator oscillators designed for LMDS and mm-wave point-to-point radio links where low phase noise and good stability are primary considerations. An internal ovenized crystal oscillator maintains the stability at +/-2 ppm with all spurious signals maintained at levels lower than -85 dBc. Power output is +17 +/-2 dBm and maximum phase noise is -95 dBc/Hz at 1 kHz offset and -105 dBc/Hz at 10 kHz offset. Available at frequencies from 9 to 13 GHz, the phase-locked sources are well suited for use in systems that use second or third harmonic mixers or multipliers to achieve frequencies from 23 to 38 GHz for up- and downconverter local oscillators.
REMEC Magnum Inc.,
San Jose, CA
(408) 432-9898.
High Frequency VCO
The model VCO690-5250T high frequency VCO generates frequencies from 5150 to 5350 MHz with control voltages from 0.5 to 5.0 V. The VCO typically requires 7.5 mA of current from a 5.0 V supply voltage. Typical phase noise is -105 dBc/Hz at 100 kHz offset. Second harmonic suppression is typically -25 dBc and third harmonic suppression is typically -30 dBc. The unit is housed in a 0.50" x 0.50" x 0.25" surface-mount, pick-and-place/reflow-compatible package.
Vari-L Company Inc.,
Denver, CO
(303) 371-1560.
1440 to 1670 MHz VCO
The model V602ME07 VCO for PCS, earth stations and portable radios generates frequencies between 1440 and 1670 MHz with 0.25 to 4.75 V DC of control voltage and with an average tuning sensitivity of 99 MHz/V. Phase noise is -101 dBc/Hz at 10 kHz offset and second harmonic suppression is typically -13 dBc. Load impedance is 50 W and operating temperature range is -40° to +85°C. The unit is available in a surface-mount package that measures 0.50" x 0.50" x 0.22". Price: $15 (1000).
Z-Communications Inc.,
San Diego, CA
(619) 621-2700.