Smd Resistor
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Smd Resistor
Get knowledge about oscillator basics
An oscillator is basically used to generate signals. It is an electronic device which is found in various devices such as computers, wireless receivers, transmitters, audio-frequency equipments, etc. Though, there are several types of oscillators but they all operate on a single principle. Every oscillator has one active device which is known as amplifier. An oscillators makes use of a sensitive amplifier which gives certain output. The output produced is supplied back to the input in phase. Thus, this helps in regenerating and sustaining the signal.
One of the most common examples of oscillators is pendulum of a clock. Whenever a pendulum is pushed back, it starts swinging and oscillating at a certain frequency. In addition to this, the length of the pendulum also determines the frequency of an oscillator.
Oscillator uses energy to move back and forth. For instance, in a pendulum, potential energy gets converted into kinetic energy which results in oscillations. In due course, friction leads any physical oscillator to stop moving. To keep pendulum moving, it is required to add energy at intervals. Even, an electronic oscillator works on a same principle.
The short description of some types of oscillators is given below:
RC and LC clock oscillators: This type of oscillators produces square wave signals. They are usually used in digital electronics circuit. The commonest types of clock oscillator are resistor capacitor (RC) and inductor capacitor (LC) oscillators.
Crystal oscillators: The determining principle in this type of oscillator is quartz crystal. These oscillators are primarily used where accuracy and stability is a primary concern. Quartz crystals are extremely stable in terms of frequency. Thermal compensation can be applied to crystal oscillators to enhance its thermal stability.
Sine wave oscillators: Sine wave oscillators are used in measurement applications, for audio signal generation and reference signals in different applications etc.
About the Author
Fox Electronics is a leading global supplier of standard and custom frequency control products, including the industry's broadest line of Quartz crystals, oscillators, VCXOs, TCXOs, OCXOs and piezoelectric effect
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which gerber files are needed for single side pcb manufacturing?
which gerber files are needed for single side pcb manufacturing?
i have created .BOT, .SST, .SMB and .DRD is this enough or any other files are needed. some of my resistors and capacitors are smd.
Each gerber file includes information for a different physical construction of the PCB, so keeping in mind how the files map to the manufacturing process will help you understand which files are needed. For example, if your board doesn't need solder mask or silk screen (white words marking locations, part names, etc.) then you wouldn't need to supply the files containing that information. Here is a quick "cheat sheet" for gerber files, in order from top to bottom:
.SST is the white (or other color) writing on the surface of the board
.SMT is the solder mask (green paint-like covering that protects the board)
.TOP is the top side copper traces and pads
.CMP (or .BOT) is the component/bottom side copper traces and pad
.SMB is the solder mask for the bottom of the board
.DRD (or .TXT sometimes) is the drill file data, which tells the manufacturer where to drill holes.
You can find much more information about it at the link below.
PhantomLED - Soldering
