Questions tagged [power-output-stage]

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on/off pin problems with the LM2678 5.0

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 ...
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30 views

Collector Current in Class A Output Stage

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....
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2answers
90 views

Output Stage Clipping

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 ...
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3answers
119 views

Ferrite bead isolation for FPGA core voltage

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 ...
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0answers
63 views

Push pull output stage max output voltage

Spent a day trying to understand the maximum and minimum output voltage of the basic circuits as shown in this figure The problem is that I have come across different expressions for the output ...
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1answer
82 views

Cross coupled Class AB output stage

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 ...
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1answer
235 views

Shorting the Output of a voltage regulator

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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1answer
53 views

DC current at input and ouput capacitance of buck

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 ...
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0answers
56 views

Shouldn't the output resistance of a class B amplifier include r_o?

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 ...
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1answer
338 views

How does a traditional CC/CV circuit work?

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 ...
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1answer
337 views

Transformer Coupled Class A Power Amplifier

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 (...
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1answer
182 views

Increasing output current of the inverting voltage doubler charge pump circuit, implemented with MAX1720

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 ...
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1answer
1k views

What is a common-emitter bjt push-pull output stage?

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 ...
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6answers
3k views

Difficulties with Class B Amplifier Biasing

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 ...