Practical Sources and Parallel Resistance in Electrical Circuits

A dependent voltage source's output voltage is controlled by a voltage from another part of the circuit.

An ideal current source is a two terminal network element that provides a constant current regardless of the voltage across it.

An ideal voltage source is a two terminal network element whose terminal voltage is constant and independent of the current drawn from it.

<p>A CCVS provides an output voltage that is controlled by an input current, while a VCCS provides an output current that is controlled by an input voltage.</p> Signup and view all the answers

<p>A practical current source maintains a constant current output up to a certain voltage level, beyond which the current decreases.</p> Signup and view all the answers

<p>Parallel circuit elements are connected in such a way that they share the same two end points but have different current paths.</p> Signup and view all the answers

<p>Diamond-shaped symbol</p> Signup and view all the answers

<p>VOUT = μVIN</p> Signup and view all the answers

<p>Volts/volts</p> Signup and view all the answers

<p>VOUT = ρIIN</p> Signup and view all the answers

<p>The output voltage 'depends' on the value of the input current</p> Signup and view all the answers

<p>Trans-resistance amplifier</p> Signup and view all the answers

<p>The characteristic of a practical current source is not flat and horizontal like an ideal current source. This is because the internal source resistance of the practical current source causes some of the current to split off and flow through the parallel resistance, reducing the current delivered to the output terminals.</p> Signup and view all the answers

<p>A dependent voltage source is a source whose terminal voltage depends on the voltage across or current through some other element in the circuit. Unlike an independent voltage source, a dependent voltage source is controlled by an input current or voltage, rather than providing a fixed voltage output.</p> Signup and view all the answers

<p>A VCVS is a dependent voltage source that depends on a voltage input, while a CCVS is a dependent voltage source that depends on a current input. Both are types of dependent voltage sources that are commonly used in the analysis of circuit elements like operational amplifiers, transistors, and integrated circuits.</p> Signup and view all the answers

<p>In a practical current source, the internal source resistance causes the current to split, with one part flowing into the parallel resistance and the other part flowing to the output terminals. This splitting of the current results in the output characteristic of the practical current source being reduced or not as flat and horizontal as an ideal current source.</p> Signup and view all the answers

<p>Ideal dependent sources are commonly used in the analysis of the input/output characteristics or the gain of circuit elements such as operational amplifiers, transistors, and integrated circuits. This is because dependent sources can be used to model the behavior of these active circuit elements, which depend on the voltage or current at other points in the circuit.</p> Signup and view all the answers

<p>The key difference is that the output characteristic of an ideal current source is flat and horizontal, meaning it provides a constant current output regardless of the load. In contrast, the output characteristic of a practical current source is not flat and horizontal due to the internal source resistance, which causes the current to split and reduces the current delivered to the output terminals.</p> Signup and view all the answers