F5 Physics Second Term Test (14-15)
... net charge of 1.0 x 10-8 C while balls Y and Z are neutral. Balls X and Y are brought into contact and then separated. Then ball Y is brought momentarily into contact with ball Z and then separated. When balls X and Z are placed 1 m apart, the electric force between them is A. 1.0 x 10-7 N ...
... net charge of 1.0 x 10-8 C while balls Y and Z are neutral. Balls X and Y are brought into contact and then separated. Then ball Y is brought momentarily into contact with ball Z and then separated. When balls X and Z are placed 1 m apart, the electric force between them is A. 1.0 x 10-7 N ...
Lab 6 - PSU MNE
... the motor control voltage is toggled rapidly enough from 0 to full scale, the electrical and inertial characteristics of the motor will smooth out the speed variations. A 0 to 5 V square wave with 50% duty cycle will produce approximately the same motor response as a steady 2.5 V DC level. In this m ...
... the motor control voltage is toggled rapidly enough from 0 to full scale, the electrical and inertial characteristics of the motor will smooth out the speed variations. A 0 to 5 V square wave with 50% duty cycle will produce approximately the same motor response as a steady 2.5 V DC level. In this m ...
I3600 Homework 3
... as the BJT rely on the flow of two types of carriers for its operation. R10 There were numerous fabrication issues that needed to be dealt with including contamination issues and oxide defects that produced unreliable or low quality devices. R11. The mobility of electrons is much higher than the mob ...
... as the BJT rely on the flow of two types of carriers for its operation. R10 There were numerous fabrication issues that needed to be dealt with including contamination issues and oxide defects that produced unreliable or low quality devices. R11. The mobility of electrons is much higher than the mob ...
Application Note AN-3010 Using the QVE00033 Surface Mount Phototransistor Optical Interrupter Switch
... This optical switch is designed to indicate the presence or absence of a vane or shield that has been placed in the emitter to detector path. Under normal or non-blocked operation, the LED shines IR light on the phototransistor. This received light develops a photocurrent in the phototransistor. Thi ...
... This optical switch is designed to indicate the presence or absence of a vane or shield that has been placed in the emitter to detector path. Under normal or non-blocked operation, the LED shines IR light on the phototransistor. This received light develops a photocurrent in the phototransistor. Thi ...
hdbr manual
... 3 - If the MBC1 is blowing fuses continually with only +12 volt, ground and remote leads connected, the unit may be faulty. System does not turn on 1 - Check all fuses. 2 - Check all connections. 3 - Measure the +12 volt and remote turn on voltages at the amplifier(s) and HDBR terminals. If these ar ...
... 3 - If the MBC1 is blowing fuses continually with only +12 volt, ground and remote leads connected, the unit may be faulty. System does not turn on 1 - Check all fuses. 2 - Check all connections. 3 - Measure the +12 volt and remote turn on voltages at the amplifier(s) and HDBR terminals. If these ar ...
A simple way to test buck converter stability
... A simple way to test buck converter stability The common way to check converter stability is via frequency domain analysis, by measuring the open loop frequency response, and observing the control loop cross-over frequency and phase margin at the cross-over point. It is a complicated measurement, re ...
... A simple way to test buck converter stability The common way to check converter stability is via frequency domain analysis, by measuring the open loop frequency response, and observing the control loop cross-over frequency and phase margin at the cross-over point. It is a complicated measurement, re ...
Lecture 15
... Voltage Divider Bias. Next let’s consider the circuit shown on Figure 11. Here we have used a voltage divider network at the base of the transistor and we have also added resistor RE at the emitter. The capacitor C is called the coupling capacitor and it provides DC isolation between the amplifier ...
... Voltage Divider Bias. Next let’s consider the circuit shown on Figure 11. Here we have used a voltage divider network at the base of the transistor and we have also added resistor RE at the emitter. The capacitor C is called the coupling capacitor and it provides DC isolation between the amplifier ...
Unit 2 PowerPoint Slides
... resistance is much less than another one connected in parallel with it, the equivalent resistance is very nearly equal to the smaller one: If R1 << R2, then Req R1 ...
... resistance is much less than another one connected in parallel with it, the equivalent resistance is very nearly equal to the smaller one: If R1 << R2, then Req R1 ...
A simple three-terminal IC bandgap reference
... bandgap voltage is described, The new two-transistor circuit uses collector current sensing to eliminate errors due to base current. Because the stabilized voltage appears at a high impedance point, the application to circuits with higher output voltage is simplified. Incorporation of the new two-tr ...
... bandgap voltage is described, The new two-transistor circuit uses collector current sensing to eliminate errors due to base current. Because the stabilized voltage appears at a high impedance point, the application to circuits with higher output voltage is simplified. Incorporation of the new two-tr ...
Electrical, Electronic and Communications Engineering Technology
... Express numbers in scientific Engineering notation. Convert one power of ten to another power of ten. Use the resistor color code. Identify component symbols used in electronic schematic diagrams. Identify schematic symbols for various types of electrical and electronic components. Identify semicond ...
... Express numbers in scientific Engineering notation. Convert one power of ten to another power of ten. Use the resistor color code. Identify component symbols used in electronic schematic diagrams. Identify schematic symbols for various types of electrical and electronic components. Identify semicond ...
Homework
... engineer wants to maintain a current of 0.5A, what would be (a) the original value of resistance, and (b) the value of the new resistor? ...
... engineer wants to maintain a current of 0.5A, what would be (a) the original value of resistance, and (b) the value of the new resistor? ...
MX341 AUTOMATIC VOLTAGE REGULATOR (AVR)
... control anti-clockwise until the generator voltage starts to become unstable. The optimum or critically damped position is slightly clockwise from this point (i.e. where the machine volts are stable but close to the unstable region). OPTIMUM RESPONSE SELECTION The stability selection ‘jumper’ should ...
... control anti-clockwise until the generator voltage starts to become unstable. The optimum or critically damped position is slightly clockwise from this point (i.e. where the machine volts are stable but close to the unstable region). OPTIMUM RESPONSE SELECTION The stability selection ‘jumper’ should ...
December 2009 - Designing a Solar Cell Battery Charger
... across a current sensing resistor in series with the inductor of the buck regulator charging circuit. Decreased illumination (and/or increased charge current demands) can both cause the input voltage (panel voltage) to fall, pushing the panel away from its point of maximum power output. With the LT3 ...
... across a current sensing resistor in series with the inductor of the buck regulator charging circuit. Decreased illumination (and/or increased charge current demands) can both cause the input voltage (panel voltage) to fall, pushing the panel away from its point of maximum power output. With the LT3 ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.