Chapter 3 - Revision history

Fonggr: /* Ideal Diode Model */

2010-03-02T21:17:13Z

Ideal Diode Model

← Older revision		Revision as of 14:17, 2 March 2010
Line 14:		Line 14:
	#Solve the circuit to find <math>i_D</math> for diodes assumed to be on and <math>v_D</math> for diodes assumed to be off		#Solve the circuit to find <math>i_D</math> for diodes assumed to be on and <math>v_D</math> for diodes assumed to be off
	#Check to see if <math>i_D</math> is positive for all diodes assumed to be on and if <math>v_D</math> is negative for all diodes assumed to be off.		#Check to see if <math>i_D</math> is positive for all diodes assumed to be on and if <math>v_D</math> is negative for all diodes assumed to be off.
	*Explain peak inverse voltage, PIV.		*'''Explain peak inverse voltage, PIV.'''

	===Thevenin equivalent===		===Thevenin equivalent===

Fonggr: /* Diodes */

2010-03-02T21:16:40Z

Diodes

← Older revision		Revision as of 14:16, 2 March 2010
Line 3:		Line 3:
	[[Image:Load_line_diode.png\|thumb\|300px\|Diode load line ]]		[[Image:Load_line_diode.png\|thumb\|300px\|Diode load line ]]
	*Forward bias occurs when the P-type semiconductor material is connected to the positive terminal of a battery and the N-type semiconductor material is connected to the negative terminal, as shown below. This usually makes the p–n junction conduct. <ref> [http://en.wikipedia.org/wiki/P-n_junction#Forward_bias Wikipedia P-N junction]</ref>		*Forward bias occurs when the P-type semiconductor material is connected to the positive terminal of a battery and the N-type semiconductor material is connected to the negative terminal, as shown below. This usually makes the p–n junction conduct. <ref> [http://en.wikipedia.org/wiki/P-n_junction#Forward_bias Wikipedia P-N junction]</ref>

			===Load Line Analysis===
	*Because diodes are a nonlinear device, traditional circuit analysis will not work on them. One method of analyze the diodes is to do it graphically. This technique is called Load-line analysis.		*Because diodes are a nonlinear device, traditional circuit analysis will not work on them. One method of analyze the diodes is to do it graphically. This technique is called Load-line analysis.
	:*The load-line equation is obtained by applying KVL or KCL. The equation plots as a straight line that can be drawn by locating two points.		*The load-line equation is obtained by applying KVL or KCL. The equation plots as a straight line that can be drawn by locating two points.
	:*You may need to make a Thevenin or Norton equivalent before doing your load-line analysis		*You may need to make a Thevenin or Norton equivalent before doing your load-line analysis

			===Ideal Diode Model===
	*In circuits with multiple diodes, it is not immediately apparent which diodes are on or off. The ideal-diode model assumes that the diode is a perfect conductor with zero voltage drop in the forward direction and an open circuit in the reverse direction.		*In circuits with multiple diodes, it is not immediately apparent which diodes are on or off. The ideal-diode model assumes that the diode is a perfect conductor with zero voltage drop in the forward direction and an open circuit in the reverse direction.
	#Assume a set of states for the diodes		#Assume a set of states for the diodes

Fonggr: /* Thevenin equivalent */

2010-03-02T20:40:15Z

Thevenin equivalent

← Older revision		Revision as of 13:40, 2 March 2010
Line 13:		Line 13:

	===Thevenin equivalent===		===Thevenin equivalent===
	#Find the Thevenin source voltage by removing the load ~~resistor~~ from the original circuit and calculating voltage across the open connection points where the load ~~resistor~~ used to be.		#Find the Thevenin source voltage by removing the load from the original circuit and calculating voltage across the open connection points where the load used to be.
	#Find the Thevenin resistance by removing all power sources in the original circuit (voltage sources shorted and current sources open) and calculating total resistance between the open connection points.		#Find the Thevenin resistance by removing all power sources in the original circuit (voltage sources shorted and current sources open) and calculating total resistance between the open connection points.

Fonggr: /* Thevenin equivalent */

2010-03-02T20:25:02Z

Thevenin equivalent

← Older revision		Revision as of 13:25, 2 March 2010
Line 13:		Line 13:

	===Thevenin equivalent===		===Thevenin equivalent===
	*1		#Find the Thevenin source voltage by removing the load resistor from the original circuit and calculating voltage across the open connection points where the load resistor used to be.
	*2		#Find the Thevenin resistance by removing all power sources in the original circuit (voltage sources shorted and current sources open) and calculating total resistance between the open connection points.

	===Full Wave Recififier: Center-tapped Transformer===		===Full Wave Recififier: Center-tapped Transformer===

Fonggr: /* Thevenin equivalent */

2010-03-02T20:23:44Z

Thevenin equivalent

← Older revision		Revision as of 13:23, 2 March 2010
Line 13:		Line 13:

	===Thevenin equivalent===		===Thevenin equivalent===
	*		*1
	*		*2

	===Full Wave Recififier: Center-tapped Transformer===		===Full Wave Recififier: Center-tapped Transformer===

Fonggr: /* Diodes */

2010-03-02T20:23:35Z

Diodes

← Older revision		Revision as of 13:23, 2 March 2010
Line 11:		Line 11:
	#Check to see if <math>i_D</math> is positive for all diodes assumed to be on and if <math>v_D</math> is negative for all diodes assumed to be off.		#Check to see if <math>i_D</math> is positive for all diodes assumed to be on and if <math>v_D</math> is negative for all diodes assumed to be off.
	*Explain peak inverse voltage, PIV.		*Explain peak inverse voltage, PIV.

			===Thevenin equivalent===
			*
			*

	===Full Wave Recififier: Center-tapped Transformer===		===Full Wave Recififier: Center-tapped Transformer===

Fonggr: /* Diodes */

2010-03-02T20:19:51Z

Diodes

← Older revision		Revision as of 13:19, 2 March 2010
Line 5:		Line 5:
	*Because diodes are a nonlinear device, traditional circuit analysis will not work on them. One method of analyze the diodes is to do it graphically. This technique is called Load-line analysis.		*Because diodes are a nonlinear device, traditional circuit analysis will not work on them. One method of analyze the diodes is to do it graphically. This technique is called Load-line analysis.
	:*The load-line equation is obtained by applying KVL or KCL. The equation plots as a straight line that can be drawn by locating two points.		:*The load-line equation is obtained by applying KVL or KCL. The equation plots as a straight line that can be drawn by locating two points.
			:*You may need to make a Thevenin or Norton equivalent before doing your load-line analysis
	*In circuits with multiple diodes, it is not immediately apparent which diodes are on or off. The ideal-diode model assumes that the diode is a perfect conductor with zero voltage drop in the forward direction and an open circuit in the reverse direction.		*In circuits with multiple diodes, it is not immediately apparent which diodes are on or off. The ideal-diode model assumes that the diode is a perfect conductor with zero voltage drop in the forward direction and an open circuit in the reverse direction.
	#Assume a set of states for the diodes		#Assume a set of states for the diodes

Fonggr: /* Clamp Circuit */

2010-03-02T20:08:40Z

Clamp Circuit

← Older revision		Revision as of 13:08, 2 March 2010
Line 24:		Line 24:

	===Clamp Circuit===		===Clamp Circuit===
			*The direction of the diode will determine whether the positive or negative peaks are clamped.
			*The charged capacitor value will determine the value the peaks are clamped at.
	*Diodes are then used to define the upper and lower limit by conducting if the voltage goes outside their specified range.		*Diodes are then used to define the upper and lower limit by conducting if the voltage goes outside their specified range.
	~~:*The direction of the diode will determine whether the positive or negative peaks are clamped.~~
	~~:*The charged capacitor value will determine the value the peaks are clamped at.~~

	===Linear Small-Signal Equivalent Circuits===		===Linear Small-Signal Equivalent Circuits===

Fonggr: /* Clipper Circuit */

2010-03-02T19:49:11Z

Clipper Circuit

← Older revision		Revision as of 12:49, 2 March 2010
Line 20:		Line 20:

	===Clipper Circuit===		===Clipper Circuit===
	*'''The resistor is large enough that the forward diode current is within reasonable bounds and small enough so that the reverse bias current results in a negligible voltage drop.'''
	*A battery + diode can be used to clip the circuit. A Zener diode will often take the place of the battery in a clipper circuit.		*A battery + diode can be used to clip the circuit. A Zener diode will often take the place of the battery in a clipper circuit.
	*Placing a resistor in series with the diodes can allow for more gradual transfer characteristics.		*Placing a resistor in series with the diodes can allow for more gradual transfer characteristics.

Fonggr: /* Clamp Circuit */

2010-03-02T19:48:57Z

Clamp Circuit

← Older revision		Revision as of 12:48, 2 March 2010
Line 25:		Line 25:

	===Clamp Circuit===		===Clamp Circuit===
	*The large capacitor acts as a DC offset and has a very small impedance for the AC signal. A large resistor is chosen to allow the capacitor to discharge slowly.
	*Diodes are then used to define the upper and lower limit by conducting if the voltage goes outside their specified range.		*Diodes are then used to define the upper and lower limit by conducting if the voltage goes outside their specified range.
	:*The direction of the diode will determine whether the positive or negative peaks are clamped.		:*The direction of the diode will determine whether the positive or negative peaks are clamped.
			:*The charged capacitor value will determine the value the peaks are clamped at.

	===Linear Small-Signal Equivalent Circuits===		===Linear Small-Signal Equivalent Circuits===