XIV. Glossary of Terms
... When LIVM sensors are supplied with constant current, a DC voltage bias exists at the center conductor of the sensor connector. The output signal is superimposed on this DC bias. The power unit extracts the signal from this bias by various means, effectively “blocking” it. The normal range for this ...
... When LIVM sensors are supplied with constant current, a DC voltage bias exists at the center conductor of the sensor connector. The output signal is superimposed on this DC bias. The power unit extracts the signal from this bias by various means, effectively “blocking” it. The normal range for this ...
Basic Characteristics Data
... : Load characteristics of power supply. : Characteristics of load (lamp, motor, constant current load, etc.). Note: In case of nonlinear load, the output is locked out at A point. Fig. 2.1 Current foldback characteristics ...
... : Load characteristics of power supply. : Characteristics of load (lamp, motor, constant current load, etc.). Note: In case of nonlinear load, the output is locked out at A point. Fig. 2.1 Current foldback characteristics ...
Low-Noise Current Preamplifier
... The RS-232 interface allows listen-only communication with the SR570 at 9600 baud. All functions of the instrument (except power on) can be set via the RS-232 interface. The RS-232 interface electronics are opto-isolated from the amplifier circuitry to provide maximum noise immunity. SR570 rear pane ...
... The RS-232 interface allows listen-only communication with the SR570 at 9600 baud. All functions of the instrument (except power on) can be set via the RS-232 interface. The RS-232 interface electronics are opto-isolated from the amplifier circuitry to provide maximum noise immunity. SR570 rear pane ...
Lecture 7 Overview - University of Delaware
... • The 74121 is non-retriggerable - it ignores input transitions when the output pulse is HIGH • It is often more useful to use a retriggerable one-shot; e.g. 74LS122 ...
... • The 74121 is non-retriggerable - it ignores input transitions when the output pulse is HIGH • It is often more useful to use a retriggerable one-shot; e.g. 74LS122 ...
CURRENT Electricity
... Closed circuit : the circuit is continuous; the switch is “on” and the current is flowing Open circuit : there is a break in the circuit; no current can flow (switch is “off”) ...
... Closed circuit : the circuit is continuous; the switch is “on” and the current is flowing Open circuit : there is a break in the circuit; no current can flow (switch is “off”) ...
past paper questions electrical circuits
... When the voltage across the resistor is reduced, the current through the resistor __________________________________________________________________________________ When the voltage of the supply is reduced, the voltage across the resistor ____________________________________________________________ ...
... When the voltage across the resistor is reduced, the current through the resistor __________________________________________________________________________________ When the voltage of the supply is reduced, the voltage across the resistor ____________________________________________________________ ...
How Does the Voltage Regulator Work
... These circuits contain the layout of the battery charger / rectifier circuit. A battery is a pretty finnicky device as far as power input is concerned. The Voltage regulator has to satisfy two goals: 1. provide a DC input source and 2. Provide a voltage of roughly 14 Volts. The regulator employs a ...
... These circuits contain the layout of the battery charger / rectifier circuit. A battery is a pretty finnicky device as far as power input is concerned. The Voltage regulator has to satisfy two goals: 1. provide a DC input source and 2. Provide a voltage of roughly 14 Volts. The regulator employs a ...
Presentation_12
... Wires in Circuits Wires in circuit diagrams are “perfect conductors.” They are thus equipotentials, and can be stretched, shrunk... as long as you don’t change the potentials! ...
... Wires in Circuits Wires in circuit diagrams are “perfect conductors.” They are thus equipotentials, and can be stretched, shrunk... as long as you don’t change the potentials! ...
Study of Chopper Amplifier
... The outputs S and S' are complement of each other. The range of high (VoH) and low (VoL) levels are: 4V < VoH < 5V and -5V < VoL < -4V. Choose the resistance values such that the transistors operate in either saturation or in cut off modes. Simulate the circuit using PSPICE and compare the s ...
... The outputs S and S' are complement of each other. The range of high (VoH) and low (VoL) levels are: 4V < VoH < 5V and -5V < VoL < -4V. Choose the resistance values such that the transistors operate in either saturation or in cut off modes. Simulate the circuit using PSPICE and compare the s ...
review for elec 105 midterm exam #1 (fall 2001)
... - replacement of large capacitors with short circuits (if capacitive reactance is insignificant at operating frequency) - replacement of large inductors with open circuits (if inductive reactance is very large at operating frequency) - DC voltage sources are typically bypassed at AC (i.e., at signal ...
... - replacement of large capacitors with short circuits (if capacitive reactance is insignificant at operating frequency) - replacement of large inductors with open circuits (if inductive reactance is very large at operating frequency) - DC voltage sources are typically bypassed at AC (i.e., at signal ...
Voltage clamp circuits for ultra-low-voltage apps
... versus the low-voltage Zener’s unacceptably high leakage current. It also features a much sharper voltage-versus-current (I-V) characteristic, along with more precise voltages). Response time (<100 ns) is also better than with the Zener, as well as its surge current handling capability (>2 A). For h ...
... versus the low-voltage Zener’s unacceptably high leakage current. It also features a much sharper voltage-versus-current (I-V) characteristic, along with more precise voltages). Response time (<100 ns) is also better than with the Zener, as well as its surge current handling capability (>2 A). For h ...
Current Mirrors - Marshall Leach
... it. Because of the Early effect, the output current can be greater than the input current. One way of obtaining a better match between the input and output currents is to use series emitter resistors on the transistors. If the current in one transistor increases, it causes the voltage across its emit ...
... it. Because of the Early effect, the output current can be greater than the input current. One way of obtaining a better match between the input and output currents is to use series emitter resistors on the transistors. If the current in one transistor increases, it causes the voltage across its emit ...
A p-channel MOSFET with a heavily-doped p
... part (a)? (c) Using the AC inversion centroid (Slide 16 of Lecture 18) as an estimate of the inversion layer thickness Tinv, what is the average carrier concentration (electrons/cm3) in the inversion layer corresponding to your answer in part (a)? ...
... part (a)? (c) Using the AC inversion centroid (Slide 16 of Lecture 18) as an estimate of the inversion layer thickness Tinv, what is the average carrier concentration (electrons/cm3) in the inversion layer corresponding to your answer in part (a)? ...
Figure 12–4 - WordPress.com
... • When current flows in a conductor, a magnetic field is generated around the conductor – Creating coils of wire increases the strength of the magnetic field – Coils of wire are referred to as solenoids • Solenoids are used to open and close electrical contacts, valves, and other controls ...
... • When current flows in a conductor, a magnetic field is generated around the conductor – Creating coils of wire increases the strength of the magnetic field – Coils of wire are referred to as solenoids • Solenoids are used to open and close electrical contacts, valves, and other controls ...
Dec
... feeder and the middle wire, and 500 such lamps between the negative and the middle wire. By accident, the middle wire becomes disconnected from the generating station. What will be the P. Ds. between the outer and neutral immediately after this occurs? 2. Three equal resistance each of 2 are joined ...
... feeder and the middle wire, and 500 such lamps between the negative and the middle wire. By accident, the middle wire becomes disconnected from the generating station. What will be the P. Ds. between the outer and neutral immediately after this occurs? 2. Three equal resistance each of 2 are joined ...
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.