Electronics Engineering

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Amplifiers comes in IC packages diagram is triangle with +/- input by adding a resistor r1 in series to the - input the gain can be found by adding a resistor from output to the - input The + terminal must be satisfied with the proper resistor

by the procedure design a half subtractor

design a logic ciruit to add two numbers with five bits each

drawthe logic diagram of afull adder using using NAND gates only ?

Generally, the multi-hop communication means the nodes within the network can able to communicate with the help of two or more nodes, which are acting as the relay nodes, between the source and destination node.

3-63A SCALING AMPLIFIER is a special type of summing amplifier with the output signaldetermined by multiplying each input signal by a different factor (determined by the ratio of the input-signal resistor and feedback resistor) and then adding these products

If you take a power source like a dc battery or AC transformer secondary winding and connect an ammeter directly across these power sources you can read the short circuit current available from that source. This gives a measure of internal resistance of the battery or the available wattage of the transformer.

On an analog ohmmeter, measurements are more precise and more accurate at the zero end of the scale.

I think 1 volt/bar when expressed in db you need to add 200 db to get reading in volts per micro pascal.

The main use of transistors in electronic circuits is as switches and memory storage

The advantage of programmable logic device is in terms of money. This device is cheaper rather than using microcontrollers that has to be certified before someone can use it.

To get the next micro instruction to be executed.

dc characterstics : 1.input offset voltage 2.input bias current 3.input offset current 4. thermal drift ac characterstics:1. CMRR 2. SLEW rate 3. rise time

Actually it can be used as a diode, but rarely is. Just connect the grid and plate together and it has been reduced to a diode. There are also certain circuits that use the cathode and grid as a diode, while also obtaining an amplified output on the plate.

there is no basic difference btw the BW. it is the same before & after the SS encoding

yes

If you're doing anything with amplifier circuits, you really need to understand dB and be able to calculate it on your own. Here is everything you need to know about dB: The definition. Please memorize this: dB gain = 10 log [ (final power) divided by (original power) ] In your example: Original power = 375 mW = 0.375 W Final power = 1.79 W (final) / (original) = ( 1.79 / 0.375 ) = 4.7733 log ( 4.7733 ) = 0.678 Gain = 10 times the log = 6.78 dB

The function of an IC 7490 Decade Counter, which is a computer chip, is to pin cycles 0 to 9 through QA, QB, QC and QD which are 4 bits in a binary number. The IC 7490 Decade Counter produces an output pulse for every ten input pulses.

You describe a series circuit. This answer is for a series circuit. The total impedance is 16 Ohms, 12 + 4. The current by Ohm's Law (Amps = Volts / Ohms) is 40 / 16, or 2.5 Amps. Kirchoff's Current Law says that the current at every point in a series circuit is the same, so the current flowing into the 1st device, the 12 Ohm resistor, is 2.5 Amps.

Ohms Law says that Voltage = Current * Ohms, so the twothings that can affect the voltage in a circuit are Current and Ohms. If have a non resistive impedance, i.e. a capacitor or inductor forming a reactance, then frequency can also affect the voltage but, mathematicaly, reactance is a frequency domain form of impedance, so my answer stands - Current and Ohms.

Transistors are commonly used as electronic switches, for both high power applications including switched-mode power supplies and low power applications such as logic gates.

When the transistor reaches a base voltage of a certain level the current will no longer increase and the output will be held at a fixed voltage. Because of this property the transistor can have values of input voltage such that the output is either completely off or completely on. The transistor is acting as a switch, and this type of operation is common in digital circuits where only "on" and "off" values are relevant.

FOR A TRANSISTOR TO BE CALLED A SWITCH it must be operating into the saturation area. whereby both diodes are fully forward biased. to saturate a transistor Essex current must flow into the base. how much rules of thumbs beta of 10. Pushing more base current will have the effect of increasing saturation voltage meaning there is a trade off. it is incorrect to assume that the voltage will no longer increase I submit that both diodes will follow an exponential curve.

Basically: BY CREATING TWO CIRCUIT LOOPS

yes

i. Constructional structures

The UJT is made up of a lightly doped n-region known as the base region onto which is joined a small heavily doped p-region called the emmitter. The PUT on the other hand is a four layer device similar to an SCR except that the gate terminal of the PUT is connected to the n-region adjacent to the anode.

ii.Operation

The intrinsic stand-off ratio of a UJT is fixed hence operating characteristics can not be alterd. The PUT, on the other hand has operating characteristics that can be altered. These include base-base resistance,intrinsic stand-off voltage, valley current and peak current and all these can be altered by setting the values of two external resistors

The DC motor speed control has a scope of four speeds. The control speeds include; high, medium, low, and off.