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Questions tagged [power-output-stage]

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3 answers
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I came across this little circuit in an audio amplifier and I just wanted to ask if this is a certain configuration of VBE multiplier, if so what is the purpose of using the Q651 PNP BJT?
SRomie's user avatar
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0 answers
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The panels produce 31.4 V under load 45V open circuit, 4.1 amperes under load. I used to have a load voltage of around 271V for 18 panels in two strings of 9 in parallel. The voltage is now about ...
selwyn brindley's user avatar
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1 vote
0 answers
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I want to amplify a rectangular signal coming from a microcontroller. It goes from -3.3V to 3.3V and has frequency of 2kHz. It is modulated with a trapezoid signal, which means the modulating signal ...
DOtr's user avatar
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5 answers
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I tried to simulate a push-pull output stage in this configuration: Here with the closed switch: As you can see, the output voltage is very low. I expected 3.3 V and 250 mA at the output. Shouldn't ...
Dario Casciato's user avatar
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-1 votes
1 answer
219 views

I recently decided to conceive a 10W class 446MHz amplifier. I want to be able to amplify a 100mW signal into a 10W, for that i'm going for a two stages amplifier : SKY65162 to amplify the signal to ...
Wireless Learning's user avatar
  • 383
2 votes
1 answer
355 views

I am attempting to drive an STP55NF06 N-Channel MOSFET with a TC4427 gate driver, switching at ~100kHz. The desired outcome is a higher current PWM square wave at the MOSFET's drain (Circuit in Figure ...
SctKwl's user avatar
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2 answers
215 views

I'm working on a power stage (LED driver) that could manage 4 different LEDs color string. Each string is composed by 6 LEDs in serie. See the image to have a better idea: The schematic is composed by ...
LucaMon's user avatar
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0 answers
240 views

I am making a linear PSU capable of O/P 600v @ 300mA. This is for vacuum tube experiments. I need to connect/disconnect the load from the PSU using a switch. I will not turn OFF the PSU itself. I ...
Ashok Das's user avatar
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0 answers
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PCB: My name is Ertuğrul. I made a regulation board with an LM2678 but I have a problem: I provide 12V input but I can not get 5V output. I only get 5V with the on/off pin enabled, but the datasheet ...
Ertugrul Sahin's user avatar
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0 answers
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The goal of this question I am having trouble with is finding the minimum output voltage, in which there are two cases: one in which Q1 turns off, and the second in which Q2 turns goes into saturation....
ModularMan's user avatar
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1 vote
2 answers
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I'm playing around with the circuit below (it's a very slimmed down version of Figure 11.10 from High Power Audio Amplifier Construction Manual pg 348) Can anyone explain what it is in the circuit ...
Cdevelop's user avatar
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1 vote
3 answers
601 views

Why is the ferrite bead isolation not recommended for any FPGA core voltages. When we usually refer any FPGA schematics the voltages output from regulators are directly connect to FPGA without any ...
Shifali's user avatar
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1 vote
1 answer
761 views

A simple question about ClassAB common source amplifier. There are two circuits which I have attached with this question, the one on the left is a standard cross coupled circuit which I have taken ...
RAN's user avatar
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1 answer
2k views

I am using this Buck Converter Input Voltage Range - 8-16V Output Voltage - 5V Load Current - 550mA This 5V is the power supply (Vcc) to the mentioned IC loads : Microcontroller , LED Driver , 2x CAN ...
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2 votes
1 answer
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I'm trying to design an audio amplifier output stage to drive a speaker load. I'd like to start with the design of this stage in order to calculate the input impedance to the output stage so that I ...
Blargian's user avatar
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1 answer
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I'm working on this website http://www.onmyphd.com/?p=voltage.regulators.buck.step.down.converter Could someone help me to understand those two statements: 1) "since the DC current of the inductor ...
kem's user avatar
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374 views

If you apply the small signal T model to the picture above, and try to get the output resistance R_out, isn't there a r_o from each emitter to the collectors, which should be in parallel to the r_e ...
jacob's user avatar
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1 answer
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I went through an application note from Texas Instruments referenced as snva829 ( the link http://www.ti.com/lit/an/snva829/snva829.pdf page 2 and 3) where they have discussed superficially the ...
learn design's user avatar
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1 answer
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I have seen in some books, in the transformer-coupled Class A amplifiers The transformer is connected between the collector and the VCC. The transformer is connected between the emitter and GND (...
Thilina S. Ambagahawaththa's user avatar
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1 vote
1 answer
581 views

I have a +3.3V voltage rail available. And I want to generate a pair of negative and positive symmetrical supplies out of it. The magnitude of the output voltages must be less than 7V and should be ...
hkBattousai's user avatar
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1 answer
2k views

My professor mentioned it briefly in class, and I've been googling it and all I find is the CC output stage. Can anyone show me a picture of this configuration and maybe describe how it works? Can you ...
Myla Izaman's user avatar
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10 votes
6 answers
5k views

Here I am referring to class B output power amplifier. This circuit should be easy to build and understand but I'm having problems with biasing since I don't really know how to bias the bases of Q1 ...
lucenzo97's user avatar
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