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 [...]
The information signal should be converted into electronic signals, when free space is the channel. Such signal consists of both electric and magnetic fields. The so-called electromagnetic signals are also referred to as radio frequency (RF) waves.
RF waves oscillate i.e., amplitude of the electric and magnetic fields vary at the specific rate. These oscillations may [...]
Communication:
It is the process of exchanging information from one position to the other. Electronic communication is the transmission, reception and processing of information between two or more locations using electronic circuits.
Elements of communication:
Information signal is given to the transmitter which then transmits the message over the medium to the receiver. Noise gets added up [...]
It is a fact that you cannot fully rely on your personal computer. There is a chance for all the electronic devices to crash at any time. What will you do if your system crashes? No need to worry about the loss of data anymore if you have paragon system backup 2010. The new paragon [...]
Buy the new Panasonic VIERA TH-P54Z1N
The Z series plasma TV of Panasonic is an ultra thin model. It is a Full-HD NeoPDP plasma TV model. Picture quality of this model is excellent. Networking capabilities of the new Viera TH-P54Z1N plasma TV is great.
Features of Panasonic Viera TH-P54Z1N:
The new Panasonic Viera TH-P54Z1N has a sub-field drive [...]
AMD Phenom II X4 955 BE features
AMD Phenom II X4 955 BE, where BE stands for Black Edition, is AMD’s fastest processor they have released till now. Default clock speed of AMD Phenom II X4 955 processor is 3.2 GHz. Socket AM3 is supported by the new AMD Phenom II X4 955 in addition to [...]
