Model Answer

... In a balanced three-phase system, the source is a balanced Y with an abc phase sequence and a line voltage Vab = 208 /50o V. The load is a balanced Y in parallel with a balanced ∆. The phase impedance of the Y is 4 + j 3 Ω / ϕ and the phase impedance of the ∆ is 3 – j 9 Ω / ϕ. The line impedance is ...

... In a balanced three-phase system, the source is a balanced Y with an abc phase sequence and a line voltage Vab = 208 /50o V. The load is a balanced Y in parallel with a balanced ∆. The phase impedance of the Y is 4 + j 3 Ω / ϕ and the phase impedance of the ∆ is 3 – j 9 Ω / ϕ. The line impedance is ...

Op Amps II, Page

... square wave with a frequency about 1/(2RC). Resistor R1 can be any value between 1kΩ and 1MΩ. Resistor R is one side of a potentiometer. Examine V+ and V- (the voltages at + and - inputs) and at the output to follow the action of the switching. It is useful to display V+ and V- simultaneously on the ...

... square wave with a frequency about 1/(2RC). Resistor R1 can be any value between 1kΩ and 1MΩ. Resistor R is one side of a potentiometer. Examine V+ and V- (the voltages at + and - inputs) and at the output to follow the action of the switching. It is useful to display V+ and V- simultaneously on the ...

The Common-Gate Configuration

... resistors. Even though the input resistance to the gate of the MOSFET is essentially infinite, the input bias resistances do create a loading effect. This same effect was seen in the common-source circuits. To calculate the output resistance, we set all independent small-signal sources equal to zero ...

... resistors. Even though the input resistance to the gate of the MOSFET is essentially infinite, the input bias resistances do create a loading effect. This same effect was seen in the common-source circuits. To calculate the output resistance, we set all independent small-signal sources equal to zero ...

Document

... • The resonance of a series RLC circuit occurs when the inductive and capacitive reactances are equal in magnitude but cancel each other because they are 180 degrees apart in phase. The sharp minimum in impedance which occurs is useful in tuning applications. The sharpness of the minimum depends on ...

... • The resonance of a series RLC circuit occurs when the inductive and capacitive reactances are equal in magnitude but cancel each other because they are 180 degrees apart in phase. The sharp minimum in impedance which occurs is useful in tuning applications. The sharpness of the minimum depends on ...

Tutorial 2 with answers

... Use Smith chart to find the following quantities for the transmission line circuit below: (a) The SWR on the line (b) The reflection coefficient at the load (c) The load admittance. (d) The input impedance of the line. (e) The distance from the load to the first voltage minimum. (f) The distance fro ...

... Use Smith chart to find the following quantities for the transmission line circuit below: (a) The SWR on the line (b) The reflection coefficient at the load (c) The load admittance. (d) The input impedance of the line. (e) The distance from the load to the first voltage minimum. (f) The distance fro ...

Section C5: Single-Stage BJT Amplifier Configurations

... In the previous discussions, we’ve talked about modes, models and curves of the BJT. So… pretty cool, but so what? Actually, this background was necessary. What we really care about for these devices is what useful functions they can actually perform and, to achieve these useful functions, we have t ...

... In the previous discussions, we’ve talked about modes, models and curves of the BJT. So… pretty cool, but so what? Actually, this background was necessary. What we really care about for these devices is what useful functions they can actually perform and, to achieve these useful functions, we have t ...

For the wave filter invented by Zobel and sometimes named after him see m-derived filters.Zobel networks are a type of filter section based on the image-impedance design principle. They are named after Otto Zobel of Bell Labs, who published a much-referenced paper on image filters in 1923. The distinguishing feature of Zobel networks is that the input impedance is fixed in the design independently of the transfer function. This characteristic is achieved at the expense of a much higher component count compared to other types of filter sections. The impedance would normally be specified to be constant and purely resistive. For this reason, they are also known as constant resistance networks. However, any impedance achievable with discrete components is possible.Zobel networks were formerly widely used in telecommunications to flatten and widen the frequency response of copper land lines, producing a higher-quality line from one originally intended for ordinary telephone use. However, as analogue technology has given way to digital, they are now little used.When used to cancel out the reactive portion of loudspeaker impedance, the design is sometimes called a Boucherot cell. In this case, only half the network is implemented as fixed components, the other half being the real and imaginary components of the loudspeaker impedance. This network is more akin to the power factor correction circuits used in electrical power distribution, hence the association with Boucherot's name.A common circuit form of Zobel networks is in the form of a bridged T. This term is often used to mean a Zobel network, sometimes incorrectly when the circuit implementation is, in fact, something other than a bridged T.Parts of this article or section rely on the reader's knowledge of the complex impedance representation of capacitors and inductors and on knowledge of the frequency domain representation of signals.↑