Electronics Engineering

In an underground cable, the distortion in the transmission of carrier frequency can be eliminated using inductive loading. This distortion causes a delay which will result into a variance of frequencies.Ê

a schematic circuit is a diagram that show you how a particular circuit works

Its cheaper, smaller in size, and lighter weight than transformer coupling in most cases, while still providing DC isolation between stages. Direct coupling, another alternative, cannot provide DC isolation and therefor tends to make the design of bias circuits more difficult.

emitter follower is a type of negative feedback ,

As far as I know, radar was invented by a Hungarian scientist named Zoltan Bay. That radar was first used in World War II by the British troops.

An advantage of JFET is stable high current operation. A disadvantage of JFET is low capacitance. An advantage of BJT is constant voltage operation. A disadvantage of BJT is low thermal conductance.

Resistance is directly-proportional to the length and resistivity of a conductor, and inversely-proportional to its cross-sectional area.

So a shorter wire would have less resistance than a longer wire made from the same material, and a wire with a greater cross-sectional area would have less resistance than one with a smaller cross-sectional area made from the same material.

Resistivity depends on the material from which the wire is made, with some materials being better conductors than others. For example, silver has the lowest resistance compared with other metal conductors having identical dimensions. Similarly, a copper wire will have a lower resistance than an aluminium wire of identical dimensions.

Radar systems usually use wavelengths and are associated with digital signal processing. They consist of a transmitter, antenna receiver, switch, data recorder, processor, and display. Radar systems are used to track things including weather.

This is essentially the same question as the difference between analog and digital. With analog electronics a voltage is used to represent (or to be an analogy for) some physical attribute in the real world. So for an analog transmission, at its simplest, a sound signal (say) is converted to a voltage, the voltage sent down a cable, then at the other end the voltage converted back into sound with a loudspeaker. With a digital system, the physicial attribute is measured and sent as a series of numbers, the numbers being converted to binary. For a digital transmission, the sound signal is converted to a series of numbers, sent as binary, and converted back to a sound signal at the other end. The advantages of digital is that it makes multiplexing much easier - making it easier to put many signals down the same physical cable. It also makes compressing the signal much easier - this is particularly effective for digital television transmission; 30-40 digital channels can be sent over the same bandwidth as 4 or 5 uncompressed analog channels. Also, digital is much more resiliant against noise - the digital receiver has to make a decision about each bit - is it there or not; noise can be pretty extreme before this becomes impossible, with analog, once noise is added its very difficult to remove it. The historical disadvantage of digital is that digital encoding and decoding equipment was expensive compared with the analog. Over the last 10 years or so, digital electronics has become much cheaper and more powerful.

What is this question really asking? If you are asking if you will find a 7400 IC in a phone, the answer is most likely no. If you are asking is there logic gates such as AND, OR, XOR, NOT gates in a mobile phone then the answer is yes, thousands if not millions of them. Where are they used in the phone? Everywhere from the CPU to the display of the screen, power management, you name it, they are there.

BTW: You should know that the CPU is nothing more than a collection of logic gates. A CPU may seem to work by magic, however I can assure you that there is nothing magic going on in a CPU.

Low voltage is a relative term, as there is no 'level' at which a voltage is rated 'low'. Electrical safety codes define low voltage as circuits that do not require the same protections necessary at higher voltages.

It is a way in which electrons from a voltage or current source stream. Electric current stream in a shut way is called an electric circuit. The point where those electrons enter an electrical circuit is known as the source of electrons.

Radiofrequency (RF) Signals:

RF signals are used in various wireless communication technologies, including:

Cellular networks: Mobile phones use RF signals to communicate with cell towers.

Wi-Fi (Wireless Fidelity): Wi-Fi devices, such as smartphones, laptops, and routers, use RF signals to connect to local wireless networks.

Bluetooth: Bluetooth-enabled devices, like headphones, speakers, and smartphones, use RF signals for short-range wireless connections.

Zigbee: Zigbee is a wireless communication protocol commonly used in smart home devices like smart lights, thermostats, and sensors.

NFC (Near Field Communication): NFC technology allows devices to exchange data over very short distances, often used for contactless payments and device pairing.

Infrared (IR) Signals:

Infrared signals are used for short-range communication between devices that have IR transmitters and receivers. TV remote controls are a common example of devices that use IR signals.

GPS Signals:

Global Positioning System (GPS) devices receive signals from multiple satellites to determine their precise location and provide navigation information. GPS signals are crucial for location-based services and navigation applications.

Capacity in Ah is not directly related to voltage. If you have 3 AA batteries, each with different mAh ratings, you should be able to connect them in parallel or series to your hearts content. In series, the voltage will be additive: 3*(1.5volts) = 4.5 volts total voltage across all three batteries in series, assuming the battery voltage is 1.5 volts. In parallel, the voltage will be equivalent to 1 battery. In parallel, the three batteries are able to provide 3 times more current at 1.5 volts than if all three are in series at 4.5 volts.

Be careful when parallelling batteries of different voltages though. This is not a good idea, as they will try to force each other to match terminal voltage (voltage at the outputs of the batteries). An example: 1.5 volt AA battery, and a 12 volt car battery can be put in series - the total voltage will be 13.5 volts. The total current that can be sourced will be limitted by the AA's limit (much less than the car battery's limit). If put in parallel, the AA will try to force the voltage of the car battery down to 1.5 volts by drawing current into itself from the car battery. Alternately, the car battery will try to force the AA to 12 volts by pushing current into the AA battery. The AA battery will overheat, and likely catastrophically fail (blow up).

The flux capacitor, which consisted of a regularly squared compartment with three flashing lights arranged as a "Y", was described by Doc as "what makes time travel possible". The device is the core component of Doc Brown's DeLorean.

The nature of your question suggests that you are trying to convert 18VDC down to 3.3VDC Perhaps to power a microprocessor running at that voltage. If you just used a simple divider circuit then there would be two resistors involved, not just one. You cannot "take" 18VDC down to 3.3VDC with a single resistor. You could limit current but not "divide" the voltage down. Really a divider circuit is not the best way to do this either because you probably want to draw at least some current at the 3.3V level. A simple divider circuit voltage would be dependent on the load.. So... I would recommend either a switching or a linear regulator (non switching, and not very efficient). There are a bunch of DC-DC switching regulators that would do the job nicely... I like the ST Micro L5981. It will output up to about an amp at 3.3V and work from 2.9V to 18VDC input. You can find the datasheet at

http://www.st.com/stonline/products/literature/ds/13004.pdf

Oh, and I'm not pushing the STMicro solution, there are many other good regulators available from Analog Devices, Linear Tech, as well as TI, and National... So Google a bit and you will discover many things for yourself...

Information on PCB or printed circuit board assembly can be found at many sites such as Pentalogix as well as M.I.S Electronics. One can input the data required and it and can easily set up a prototype for ones use.

Node is Actually is nothing you can consider its as point where the Current (Ampere) Actually Get Distributed in Two or more ways .. where every get current divided that point will be know as Node

A telephone exchange serving a single organization, having a switchboard and associated equipment, usually located on the customer's premises; provides for switching calls between any two extensions served by the exchange or between any extension and the national telephone system via a trunk to a central office. Abbreviated PBX. (Sci-Tech Dictionary) For the source and more detailed information concerning your request, click on the related links section (Answers.com) indicated below this answer box.

For an ideal transformer, the voltage ratio is the same as its turns ratio.

A polarized capacitor is one which has a polarity, positive on one terminal, negative on the other. This makes it superficially look like a battery. In use, the capacitor has its positive voltage always higher than that on the negative terminal, it matters that this is the case and this gives rise to the term polarized. This sort of capacitor is commonly found in power supply filters.

only two connections are possible.. parallel connection is always desired than series. .