Contents
What is resistor and capacitor?
A resistor is an electronic component used to resist the flow of current in a circuit. It’s more like a friction which restricts energy. A capacitor, on the other hand, is an electronic component used to store electrical charge. It generally opposes changes in current in electrical and electronic circuits.
What is resistor Capacitance?
What Is Resistor Capacitance? Capacitance is an ability of a body to store electrical energy in the form of electrical charge (Q). Practical resistors always exhibit capacitance as a parasitic property. Depending on the application, resistor capacitance might be easily disregarded, especially in DC circuits.
What are the different types of spice transistors?
MODELS of Selected Devices and Components 6.1 Macromodel for the 741 6.2 Diode 1N4148 6.3 NPN Transistors: 1N2222A and 2N696 6.4 MOSIS models: 1.2 um CMOS 6.5 JFET model: 2N5459 7. MOST COMMON MISTAKES 8. WHEN SPICE DOES NOT RUN 9. REFERENCES 1. INTRODUCTION
How are voltage sources used in a SPICE circuit?
A current source of positive value forces current to flow out of the N+ node, through the source, and into the N- node. Voltage sources, in addition to being used for circuit excitation, are the ‘ammeters’ for SPICE, that is, zero valued voltage sources may be inserted into the circuit for the purpose of measuring current.
How do you calculate resistance in SPICE circuit?
If MNAME is specified, then the resistance may be calculated from the process information in the model MNAME and the given LENGTH and WIDTH. If VALUE is not specified, then MNAME and LENGTH must be specified. If WIDTH is not specified, then it is taken from the default width given in the model.
How is the current controlled in a spice switch?
For the current controlled switch, the controlling current is that through the specified voltage source. The direction of positive controlling current flow is from the positive node, through the source, to the negative node. The switch model allows an almost ideal switch to be described in SPICE.