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Because of transmission line loss and distortion it is difficult to carry digital signals above 66 MHz on standard PCB traces (the clock signal is the highest frequency in a synchronous digital system), CPUs that run faster than that speed invariably are single-chip CPUs with a phase-locked loop (PLL) or other on-chip oscillator, keeping the ...
Oscillator sync is a feature in some synthesizers with two or more VCOs, DCOs, or "virtual" oscillators.As one oscillator finishes a cycle, it resets the period of another oscillator, forcing the latter to have the same base frequency.
Repetition codes are one of the few known codes whose code rate can be automatically adjusted to varying channel capacity, by sending more or less parity information as required to overcome the channel noise, and it is the only such code known for non-erasure channels.
The balance spring is a fine spiral or helical torsion spring used in mechanical watches, alarm clocks, kitchen timers, marine chronometers, and other timekeeping mechanisms to control the rate of oscillation of the balance wheel. The balance spring is an essential adjunct to the balance wheel, causing it to oscillate back and forth.
In general terms, at any given frequency the log-periodic design operates somewhat similar to a three-element Yagi antenna; the dipole element closest to resonant at the operating frequency acts as a driven element, with the two adjacent elements on either side as director and reflector to increase the gain, the shorter element in front acting ...
Frequencies also used are 8.6436 MHz and 17.2872 MHz. 4.332 RDS: 3648× the RDS signal bit rate of 1187.5 bit/s. While the frequency of 4.332 MHz is the most commonly used crystal resonator, its multiples (2×4.332 MHz = 8.664 MHz or 4×4.332 MHz = 17.328 MHz) have been used also. 4.43361875 PAL/NTSC: PAL B/D/G/H/I and NTSC M4.43 color subcarrier.
The Lucas spiral, made with quarter-arcs, is a good approximation of the golden spiral when its terms are large.However, when its terms become very small, the arc's radius decreases rapidly from 3 to 1 then increases from 1 to 2.
The line of constant damping just described spirals in indefinitely but in sampled data systems, frequency content is aliased down to lower frequencies by integral multiples of the Nyquist frequency. That is, the sampled response appears as a lower frequency and better damped as well since the root in the z -plane maps equally well to the first ...