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110 Threads found on edaboard.com: Center Tap
Each of which has two phases in the primary winding. Don't know what this means. It's a single-phase transformer. The primary may be connected phase-phase, but what's the purpose of the center tap? when I disconnect one of phases (for example L1) from Tr2, there is still voltage in that disconnected phase that is due to re
Hi, I am building a small AM TX attached. I would like to replace the diodes with tube rectifiers (semiconductor-free), whereas I need to keep the power transformer simple (no center tap). There as three options without a center tap, I am aware of: 1. A half wave rectifier (too much ripple) 2. A full wave bridge rectifier (...)
A "common base" configuration - adding one resistor and making a divider with about a 1.2V center tap, connected to BJT base, and applying the control voltage (you did not say whether "0" and "1" are voltage, or logic) to the BJT emitter terminal would do what you (say you) want, provided that the control voltage is stiff enough to provide th
It certainly sounds like a power supply problem. The normal transformer connection method is one wire is the center tap of the other two so from that connection you should get testmeter continuity to the other two and an equal AC voltage from them. Before delving too deepling into the capacitors which I suspect are not the problem in this case, c
Hi all I want to design a on chip transformer with center tap to for PA input and output match and center tap used for bias supply . But the ADS mom designed transformer (SP_black block)used for bias supply in cadence simulation ,My main power amplifier device was not operating in the right quiescent point. (...)
if two in series; one forward and another reversed. then no current would flow either way through in any situation unless you cause a avanlanch break down and ruin one of the diode? You are not mentioning a center tap connecting anywhere. So the answer is simple, the circuit makes only sense for zener diodes.
spiral_std_mu_z are the normal inductors in the ultra thick metal layer of the process whereas spiral_sym_ct_mu_z are the center tapped inductors which are symmetric about the center tap, which is also in the ultra thick metal of the process. If you are doing a single ended LO buffer design, you have to go for (...)
sure, use a transformer with the output center tapped. connect 40V to center tap, and put 5V square wave on primary
The left pair would appear to be a cheesy bias resistor with a center tap, which also biases a matched pair at the right, this being a combined current source load and cascode. The current source is also seen at the output pullup.
Depends how much output power you require from it. If you want to maximize output power and also need wide bandwidth, you'll want to use a transformer balun, with the center tap of the transformer connected to Vvco. Keep in mind that the S22 of this will be poor, despite getting more output power.
The Fender schematic shows that the secondary winding has a center tap. Thus the transformer appears to be a 16.4-0-16.4V. (Two windings, connected in the center.) After rectifying and filtering, the power supply is bipolar +15 -15V. The center tap is a convenient way to create this type of power supply. (...)
The following simple balanced modulator may help you to understand. We have a 10MHz carrier input on N1 of the transformer. We apply a modulation signal at the center-tap on the primary. In the first plot, we have a10kHz pure sine-wave modulation with the balancing pot P1 just of the 50% mark. You can see the carrier, and the two side-bands 10k
Hi, Don't bother about the center tap voltages. On the receiver side it is just used to bias the inputs, so that the voltages keep within the common mode voltage of the receiver comparator. On the transmitter side it is useless somehow (for totem pole outputs). Maybe the drivers use open collector output stages.. Terminating resistors should be
Hey guys, Attached is the figure of a instumentation amplifier which I am trying to get to work. I am trying to amplify a 10MHz signal received by a 2uH center-tapped aircoil. Its running off a 9V battery and a reference voltage of 2.5 V (Vref) is generated by a general purpose op amp. Also an LDO provides a regulated 5V supply to the opamps (LM
No it's not a CT. It's a modified RF splitter. It is similar to modifying a (hybrid type) 3dB Splitter with 100R from center tap to ground and re-arranging to add a bridge to rectify the signal returned due to imbalanced impedance between source and load and outputting a Vdc to the combiner port (= splitter input port)
Use common voltage regulator ICs to do it. Their datasheets shows their minimum input DC voltage requirement. Of course a transformer with a center-tap must be used to make both polarities and a rectifier bridge must be used plus a main filter capacitors. Since you do not need any current then it will be a small and simple project.
CT = center tap, they are the 'half way' point along the windings and used as the zero SIGNAL reference point for the differential data. On the LAN side they usually have an isolated DC supply added to them to alert the other end of the link that it is 'live'. Brian.
Hello, I am refining this amplifier this time I perform some measurements as I build it. I have built the input circuit up to T1. I connect the 50Ohm oscilloscope to the two points of the transformer (not the center tap). I expected to see inverter sinewave waveforms, but I see inverter distorted waveforms. Is that norma
Hi everyone, I have a center tap toroidal Transformer transformer with 14.5V-0-14.5 (RED BLACK RED) outputs. the input is 220V AC and the output 14.5V-0-14.5 (RED BLACK RED). If im just using the black and 1 red wire I get around 16V same as the other red wire. but when I connect them in series to get around 29V the transformer get very hot an
It depends on winding method and how the centre tap is created. If a single wire is wound then the centre tap connects the output of one inductor to the input of the next , thus the opposite polarity or phase exists on each side. If two wires are wound (bi-filar) and the centre tap is one end pair connected, then the currents oppose each (...)


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