MC1648 PDF

10pcs MCP MC Voltage Controlled Oscillator | Business & Industrial, Electrical Equipment & Supplies, Electronic Components & Semiconductors. “On investigating the internal circuit of the MC it became clear that the ┬ÁH choke was a DC path for biasing the IC. The RF path from the tuning inductor . The MC is based on the VCO circuit topology of the MC The. MC has been realized utilizing Motorola’s MOSAIC III advanced bipolar process.

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This amount is subject to change until you make payment. You still need filtering but keying a crystal oscillator will give a relatively clean signal and at mc168 frequency you can make a fairly stable VCO.

Last edited by gzimmer on Tue Mar 01, Sign up for newsletter. They will perform no better than a simple single transistor oscillator and have similar power outputs.

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Initial value depending on the input 8. See other items More When building this circuit with discrete components, I think that Q9 can be omitted and that R11 of 2k must be removed, so that both current mirrors see each a collector loading resistor of 2k. See the seller’s listing for full details. Learn More – opens in a new window or tab. Beginners and Experts Welcome! Add to watch list Remove from watch list. I am not sure whether the MC phase-lock-loop device is still available but the idea could be applied to any discrete component oscillator and I hope to try this some time in the future.


These characteristics are much superior to the conventional VCO, which tends to be limited to a frequency span of not more than 3: Fuse Amperage Determination Circuit Even tried a much smaller bypass cap, but no joy.

Back to home page. By actively holding the inductor’s reactance constant in a feedback system that tracks the tuning varactor, high Q and exceptionally constant output power are maintained over the entire frequency span. If you connect a 10 turn pot to the AGC pin, you can reduce the gain to the point where it stops oscillating.

Regeneration control is smooth. You will probably get similar results with a CD, being CMOS it isn’t intended to drive low impedance loads like an antenna. Minimum monthly payments are required. This item will ship to United Statesbut the seller has not specified shipping options.

The ‘saturable-core reactor’ ie tunable toroid consists of a ferrite T toroid-core inductor sited in the variable magnetic field. Also consider that their outputs are essentially digital so you still need filtering to eliminate the harmonics. If you add a frequency divider and reference oscillator, both will be quite stable, if m1648 power but the circuit gets significantly more complicated.

Originally Posted by betwixt. It has an output stage which is intended to clip the wave-form to give a square wave out. Report item – opens in a new window or tab. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or mv1648 Share on Pinterest – opens in a new window or tab Add to watch list.


A voltage proportional to the emitter cu mc164 appears at the collector, which is amplified and detected. This item will be shipped through the Global Shipping Program and includes international tracking. Probably OK but seller needs to alter listing.

My goal is to make the oscillator as simple as possible. Maximum power point in solar converter Add to watch list. Any chance of a video on this set’s performance? SPI verilog testbench code 6. This combination requires less than mA to saturate the inductor fully.

Tried mv1648 use the internal diode as a detector, but had no joy.

MC how stable is it?

The chip has an internal diode detector which is used for AGC to keep the Oscillator level stable. Part and Inventory Search. Mathematical formula of the minimum separations required between two patch antennas? Add to cart to save with this special offer.

MC Regen – The RadioBoard Forums

Visit my eBay store. Learn more – opens in new window or tab. This current is metered byconnectingthe ground end of the coil to the synthetic ground at the collector of a ground-base stage. Learn more – opens in a new window or tab.