Signal processing is an integral part of all branches of engineering. Systems capable of processing signals in different ways are being designed and developed.
For example:
A digital camera captures the light reflected from an object, processes it and store the processed signal (the image)
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A signal is something which has [...]
There are two common methods of producing a pseudo stereo effect from a mono signal, playing the mono signal from the two speakers in antiphase, and the use of frequency selective techniques which normally consists of directing lower frequency signals into one channel and higher frequency signals into the other. This circuit uses the second [...]
Wireless communication has experienced tremendous growth in the last decade. High data rate wireless communication is becoming increasingly important to mobile users in corporate and public networks in the indoor environment. Although voice and low data rate services were the first applications of cellular networks, the focus in recent years has shifted to very high-bandwidth [...]
Sometimes we get a notebook that packs so much punch into an affordable platform that makes us wake up and actually take notice. And this is the case with Toshiba Satellite L300D – 01N Laptop computer. Big name but small price!
This Satellite L300 laptop from Toshiba is well within an affordable price range, but it [...]
Mobile phones have become an integral part of our life. It has influenced our lives in such a way that we cannot even live without mobile phones. Since it is a battery operated device, we expect maximum hours of operation after a battery recharge. You can make sure that your mobile phone will not become [...]
A telephone amplifier enables more than one person to follow a telephone conversation. The unit described here, in common with all normal units of this type, requires no direct connection to the telephone. Instead, the special pick-up coil has a built-in rubber suction cap that enables it to be easily attached to the telephone base. [...]
At first sight this circuit may seem to be a straightforward Class B design having an emitter follower, complementary output pair and Darlington Pair common emitter drive stage. However, the output devices are, in fact, complementary VMOS transistors used in the source follower mode (the FET equivalent of the emitter follower).
R1 and R2 are used [...]
Used in conjunction with one of the cassette mechanisms currently available on the surplus market (or a mechanism removed from an old recorder or player) this preamplifier circuit makes an inexpensive but useful cassette player for use with a hi-fi system.
The output signal level from a cassette tape head is typically about 500 micro Volt [...]
This is a 12 dB per octave add-on scratch and rumble fill-r which can be connected into the ‘tape Monitor’ or some similar facility of the amplifier.
It is a conventional second order filter circuit having passive high pass filter formed by the series capacitance C3 and C4, plus the parallel resistance of R2 and R3 [...]
The term “amplifier” covers a very wide range, from a one transistor preamp to an ultra sophisticated high power hi-fi system. There is little doubt that the circuit shown here is very simple. The output is in the order 250mW – quite sufficient for most purposes and comparable to that of the average transistor radio. [...]
A treble booster circuit can be used with an electric guitar (and also electronic instruments) to boost the higher order harmonics and give a more brilliant sound. A circuit of this type gives a fairly flat response at bass and most middle audio frequencies, with the upper-middle and lower treble frequencies being given a substantial [...]
Records are cut with a frequency response such that when they are replayed with a magnetic pickup and a preamplifier with RIAA equalization (Recording Industry Association of America) the reproduced sound will be as similar to the original as possible.
The disc is cut at constant amplitude, except from 500Hz to 2120Hz where it is cut [...]
Download manager software can do wonders for people who wish to download a lot of data and files. The main problem with downloading large files is that, there is a chance for the internet connection to break while downloading. If you are using a download manager then the file download will resume when the connection [...]
Intel atom Z500 processors are very small processors with a dimension of 13X14 mm. Intel atom Z500 consist of nearly 47 million transistors. Number of transistors that constitute Intel atom Z500 processor is more than the number of transistors used to build up Intel Pentium 4 processor. Level-1 cache of Intel atom Z500 processor is [...]
Among all processors now available in the market Intel core 2 duo E6700 is the most cost efficient processor. Since miniaturization is the order of the day processors that can deliver the maximum with the minimum power is preferred by the industry. If the power consumption of a processor is less heat generated by it [...]
