Remote Sense - Vishay Precision Group
... Leadwire attenuation is directly dependent upon the ratio of wire resistance to strain gage bridge resistance, and by keeping the wire resistance to no more than a few percent of the bridge resistance, the error will be on the same order of magnitude. For example, for a three-wire quarter-bridge cir ...
... Leadwire attenuation is directly dependent upon the ratio of wire resistance to strain gage bridge resistance, and by keeping the wire resistance to no more than a few percent of the bridge resistance, the error will be on the same order of magnitude. For example, for a three-wire quarter-bridge cir ...
Clicker Question 21-1 Which light bulb(s) will light up?
... Three identical light bulbs are connected in parallel to a constant voltage power supply. Initially, switch S1 is closed and the other two switches open. When the other two switches, S2 and S3, are closed, the brightness of the first light bulb a) b) c) ...
... Three identical light bulbs are connected in parallel to a constant voltage power supply. Initially, switch S1 is closed and the other two switches open. When the other two switches, S2 and S3, are closed, the brightness of the first light bulb a) b) c) ...
A Current-Mode Square-Rooting Circuit Using Negative Feedback Technique
... instrumentation. For example it can be used to compute the Euclidean distance between two vectors[1], or to calculate the r.m.s. value of an arbitrary waveform[2]. In the past, squarerooting circuit was proposed by using operational amplifiers(op-amp) and bipolar junction transistors[3]. This approa ...
... instrumentation. For example it can be used to compute the Euclidean distance between two vectors[1], or to calculate the r.m.s. value of an arbitrary waveform[2]. In the past, squarerooting circuit was proposed by using operational amplifiers(op-amp) and bipolar junction transistors[3]. This approa ...
FE Review - Basic Circuits
... Power dissipated in a Resistor Recall that: Power = v*i Using Ohm’s Law, the power dissipated in a resistor can be re-written multiple ways: P = (i*R)*i = i2R P = v*(v/R) = v2/R These expressions hold true regardless of sign convention… Power is always dissipated in a ...
... Power dissipated in a Resistor Recall that: Power = v*i Using Ohm’s Law, the power dissipated in a resistor can be re-written multiple ways: P = (i*R)*i = i2R P = v*(v/R) = v2/R These expressions hold true regardless of sign convention… Power is always dissipated in a ...
Testing Power Sources for Stability
... (left-half-plane) zero, while causing a phase lag instead of a lead. They are usually caused by parallel signal paths in a circuit, one inverting and one non-inverting, and happen at the transition in frequency where the dominant path changes from inverting to non-inverting or vice-versa. In the cas ...
... (left-half-plane) zero, while causing a phase lag instead of a lead. They are usually caused by parallel signal paths in a circuit, one inverting and one non-inverting, and happen at the transition in frequency where the dominant path changes from inverting to non-inverting or vice-versa. In the cas ...
Critical Design Review
... The MAX608 low-voltage step-up controller operates from a 1.8V to 16.5V input voltage range. Pulse-frequency-modulation (PFM) control provides high efficiency at heavy loads, while using only 85μA (typical) when operating with no load. In addition, a logic-controlled shutdown mode reduces suppl ...
... The MAX608 low-voltage step-up controller operates from a 1.8V to 16.5V input voltage range. Pulse-frequency-modulation (PFM) control provides high efficiency at heavy loads, while using only 85μA (typical) when operating with no load. In addition, a logic-controlled shutdown mode reduces suppl ...
Design Options for High Efficiency Linear Handset Power Amplifiers
... formats and frequency bands. While use of a dynamic power supply is the highest efficiency technique for polar modulation, a variety of other approaches are interesting. Direct use of digital inputs for amplitude control at the modulation rates is a convenient technique that leverages the capabiliti ...
... formats and frequency bands. While use of a dynamic power supply is the highest efficiency technique for polar modulation, a variety of other approaches are interesting. Direct use of digital inputs for amplitude control at the modulation rates is a convenient technique that leverages the capabiliti ...
to U217B datasheet.
... comparator is negative (Pin 4) with respect to the non– inverted input (Pin 3) and internal reference voltage. A ramp generator with free selectable duration is possible with capacitor C2 at Pin 2 which provides not only symmetrical pulse burst control (figure 3), but also control with superimposed ...
... comparator is negative (Pin 4) with respect to the non– inverted input (Pin 3) and internal reference voltage. A ramp generator with free selectable duration is possible with capacitor C2 at Pin 2 which provides not only symmetrical pulse burst control (figure 3), but also control with superimposed ...
Basler Electric AVC63-12 and AVC125
... 1 PU V/Hz. No connection to terminal 8 will result in an underfrequency slope of 2 PU V/Hz. The slope can also be selected on the 400 Hz models. However, the actual V/Hz curve is approximately 1 PU or 2 PU, depending if terminal 8 is jumpered to 6a. Stability (STB) An oscilloscope or other voltage r ...
... 1 PU V/Hz. No connection to terminal 8 will result in an underfrequency slope of 2 PU V/Hz. The slope can also be selected on the 400 Hz models. However, the actual V/Hz curve is approximately 1 PU or 2 PU, depending if terminal 8 is jumpered to 6a. Stability (STB) An oscilloscope or other voltage r ...
Student Exploration Sheet: Growing Plants
... Introduction: Have you ever touched an incandescent light bulb that has been on for a while? Ouch! What you feel is frictional heat produced by the current moving through the light’s resistor. The high heat produced in electric circuits leads to the danger of electrical fires. A fuse is a safety dev ...
... Introduction: Have you ever touched an incandescent light bulb that has been on for a while? Ouch! What you feel is frictional heat produced by the current moving through the light’s resistor. The high heat produced in electric circuits leads to the danger of electrical fires. A fuse is a safety dev ...
ref3025.pdf
... The REF30xx is a series, CMOS, precision bandgap voltage reference. Its basic topology is shown in Figure 1. The transistors Q1 and Q2 are biased such that the current density of Q1 is greater than that of Q2. The difference of the two base-emitter voltages, Vbe1 – Vbe2, has a positive temperature c ...
... The REF30xx is a series, CMOS, precision bandgap voltage reference. Its basic topology is shown in Figure 1. The transistors Q1 and Q2 are biased such that the current density of Q1 is greater than that of Q2. The difference of the two base-emitter voltages, Vbe1 – Vbe2, has a positive temperature c ...
Electricity Training Course
... and voltage. Determine the inductive reactance of a circuit, given the value of the inductor, frequency, and voltage. Determine the impedance of a circuit, given the values of the inductive and capacitive reactance, and the resistance. Calculate the ”apparent” power and the “true” or “actual” ...
... and voltage. Determine the inductive reactance of a circuit, given the value of the inductor, frequency, and voltage. Determine the impedance of a circuit, given the values of the inductive and capacitive reactance, and the resistance. Calculate the ”apparent” power and the “true” or “actual” ...
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.