Search results
Results from the WOW.Com Content Network
A blocking oscillator (sometimes called a pulse oscillator) is a simple configuration of discrete electronic components which can produce a free-running signal, requiring only a resistor, a transformer, and one amplifying element such as a transistor or vacuum tube.
Millman and Taub observe that "As a matter of fact, the only essential difference between the tuned oscillator and the blocking oscillator is in the tightness of coupling between the transformer windings." (p. 616) I will do some work on this article at some point or other. (I will need to review the analyses myself; they are non-trivial).
The blocking oscillator recovers to the initial state and the cycle starts again. [2] The receive frequency of the Armstrong Super-Regenerative receiver was some hundred kilohertz. The self-quenching frequency was ten kilohertz, just above the highest audio frequency the headphone could reproduce.
This circuit compares the frequency of a controlled oscillator to the reference, automatically raising or lowering the frequency of the oscillator until its frequency (but not necessarily its phase) is matched to that of the reference. A frequency-locked loop is an example of a control system using negative feedback. Frequency-lock loops are ...
Another measure of oscillator noise is L, which is simply S v normalized to the power in the fundamental. As t → ∞ the phase of the oscillator drifts without bound, and so S φ (Δf) → ∞ as Δf → 0. However, even as the phase drifts without bound, the excursion in the voltage is limited by the diameter of the limit cycle of the ...
A numerically controlled oscillator (NCO) is a digital signal generator which creates a synchronous (i.e., clocked), discrete-time, discrete-valued representation of a waveform, usually sinusoidal. [1] NCOs are often used in conjunction with a digital-to-analog converter (DAC) at the output to create a direct digital synthesizer (DDS). [3]
In electronics, a delay-locked loop (DLL) is a pseudo-digital circuit similar to a phase-locked loop (PLL), with the main difference being the absence of an internal voltage-controlled oscillator, replaced by a delay line.
At reset, the bootloader runs first and does some user-programmed determination whether to re-program or to jump to the main application. The code can re-program through any interface available, or it could read an encrypted binary through an Ethernet adapter like PXE. Atmel has application notes and code pertaining to many bus interfaces.