BD8151EFV,BD8157EFV : Power Management ICs
... Set with sufficient margin because the coil L value may have the dispersion of approx. 30%. If the coil current exceeds the rating current ILR of the coil, it may damage the IC internal element. BD8157EFV uses the current mode DC/DC converter control and has the optimized design at the coil value. ...
... Set with sufficient margin because the coil L value may have the dispersion of approx. 30%. If the coil current exceeds the rating current ILR of the coil, it may damage the IC internal element. BD8157EFV uses the current mode DC/DC converter control and has the optimized design at the coil value. ...
how diodes work - Wiki - Joe Knows Electronics
... smaller, roughly inversely proportional to the square root of the applied voltage. While the effect is fairly small in conventional diodes, designs capable of relatively large capacitance ranges have been developed. The SMV1249 varicaps in your kit have a capacitance range between 37 and 2 picofarad ...
... smaller, roughly inversely proportional to the square root of the applied voltage. While the effect is fairly small in conventional diodes, designs capable of relatively large capacitance ranges have been developed. The SMV1249 varicaps in your kit have a capacitance range between 37 and 2 picofarad ...
Experiment # 1 - GWU`s SEAS - The George Washington University
... measure the voltage and current and calculate the power dissipation of each resistor in the three circuits given. Use V1 = 6 Vdc. a) For the circuit in Fig. 1A: 1) Construct the circuit in Fig. 1A using a breadboard. DO NOT connect the power supply (V1) to the circuit yet. Use the DMM to measure the ...
... measure the voltage and current and calculate the power dissipation of each resistor in the three circuits given. Use V1 = 6 Vdc. a) For the circuit in Fig. 1A: 1) Construct the circuit in Fig. 1A using a breadboard. DO NOT connect the power supply (V1) to the circuit yet. Use the DMM to measure the ...
Circuit Note CN-0275
... the corrected step signal at the equalizer output that settles to 1% error in less than 70 ns. Note that the time scale in Figure 4 is in nanoseconds. ...
... the corrected step signal at the equalizer output that settles to 1% error in less than 70 ns. Note that the time scale in Figure 4 is in nanoseconds. ...
sources - CElliott
... 2. Be sure to read all of the instructions on the left side of the page. 3. Click on “the hand”. 4. Click on “building a series circuit”. Click OK. 5. In a series circuit, circuit elements are connected ___________________________________. This provides only _______________________________ for the c ...
... 2. Be sure to read all of the instructions on the left side of the page. 3. Click on “the hand”. 4. Click on “building a series circuit”. Click OK. 5. In a series circuit, circuit elements are connected ___________________________________. This provides only _______________________________ for the c ...
September 29th Circuits - Chapter 28
... How do we add the changes in V? ! Resistance – Move through resistor in direction of current V =-iR (because it is down the hill), in opposite direction V =+iR (+ because we move up the hill) ! Emf – Move lower (-) to (+) adds potential and V =+E, in the opposite direction V =- E. ...
... How do we add the changes in V? ! Resistance – Move through resistor in direction of current V =-iR (because it is down the hill), in opposite direction V =+iR (+ because we move up the hill) ! Emf – Move lower (-) to (+) adds potential and V =+E, in the opposite direction V =- E. ...
Time Delay Relays – Application Data
... The difference between relays and time delay relays is when the output contacts open & close: on a control relay, it happens when voltage is applied and removed from the coil; on time delay relays, the contacts will open or close before or after a pre-selected, timed interval. Typically, time delay ...
... The difference between relays and time delay relays is when the output contacts open & close: on a control relay, it happens when voltage is applied and removed from the coil; on time delay relays, the contacts will open or close before or after a pre-selected, timed interval. Typically, time delay ...
Protecting from Electro-Static Discharge (ESD)
... printers, instrumentation, medical monitoring apparatus and other applications. For ESD, a relatively small device such as one of Microsemi's 1.4KESD axial lead series or the SM1.4KESD and MLL1.4KESD surface mount series devices are adequate. However if induced lightning is also a threat, a larger d ...
... printers, instrumentation, medical monitoring apparatus and other applications. For ESD, a relatively small device such as one of Microsemi's 1.4KESD axial lead series or the SM1.4KESD and MLL1.4KESD surface mount series devices are adequate. However if induced lightning is also a threat, a larger d ...
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... may be allowed to flashover. Lightning impulse withstand level known as Basic Insulation Level(BIL).Various equipment and their component parts should have their BIL above the system protective level by a margin which is determined with respect to air insulation. ...
... may be allowed to flashover. Lightning impulse withstand level known as Basic Insulation Level(BIL).Various equipment and their component parts should have their BIL above the system protective level by a margin which is determined with respect to air insulation. ...
Model 1176LN Solid-State Limiting Amplifier
... Figure 4 - Using a FET as a voltage-variable resistor. The combination of R5 and Q1 acts as a voltage divider which controls the gain. LN Circuitry The LN circuit, which appeared in revisions ‘C’ and later, was designed to reduce the distortion that the FET introduced in the gain reduction stage. FE ...
... Figure 4 - Using a FET as a voltage-variable resistor. The combination of R5 and Q1 acts as a voltage divider which controls the gain. LN Circuitry The LN circuit, which appeared in revisions ‘C’ and later, was designed to reduce the distortion that the FET introduced in the gain reduction stage. FE ...
Ultrasonic level measuring device, non
... measures the filling of the container. An empty container can thus be readied in good time before the max. level is reached. ...
... measures the filling of the container. An empty container can thus be readied in good time before the max. level is reached. ...
Testing of Low Voltage Installations
... – Combined protection against both Direct & Indirect Contact – Protection against Direct Contact – Protection against Indirect Contact ...
... – Combined protection against both Direct & Indirect Contact – Protection against Direct Contact – Protection against Indirect Contact ...
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.