All Questions
Tagged with power-amplifier biasing
8 questions
1
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1
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99
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Is it good to "pull" the amplifier low on start up?
Some amplifiers have used relays to "turn on" the speakers. This is done to prevent the popping sound on the startup of the system and the speaker.
When using my previous TDA2050, is it not ...
- 2,657
0
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1
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44
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Feeding a Reverse voltage at the output pin of an isolated DC DC converter
We have designed a Biasing card for an amplifier, In which it consists of a sequencer, a regulator to generate VG and a DC-DC converter along with Hot swap circuit for controlling the VD.
I used THN30-...
0
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0
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57
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Noise observed in QPA2935
I am using a "Pulsed biasing board" which provides the drain signal and gate signal to a power amplifier.
I am interfacing the same with QPA2935 driver amplifier(DA)
Please find the ...
1
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0
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39
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Load is switching between 0V and overcurrent in the pulsed drain biasing circuit for a Power Amplifier
Given below is a block diagram of an evaluation-board.
It is a pulsed biasing board to a PA. It is designed to produce a pulsed-drain and pulsed-gate signal for the biasing of GaN Power Amplifiers.
I ...
0
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0
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236
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Bias up and down sequence of a GaN power amplifier
I am trying to build a biasing sequence circuit for a GaN power amplifier.
The GaN power amplifier I am using has a particular bias-up and bias-down sequence as shown below:
The figure below is a ...
0
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0
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109
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Output Stage Stability
I've been reading over amplifier output stage design and hoped someone might be able to advise if my circuit has any fundamental flaws - or if there are any tweaks I should make that would bring ...
- 307
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1
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620
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Power amplifier - Drain voltage should be pulsed?
I am trying to bias the power amplifier QPA1022. I am planning to bias this amplifier by fixed gate voltage and pulsed drain voltage.For this I am using MABC-001000-DP000L for the same.
I am unable to ...
- 227
1
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3
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810
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In a class C amplifier, how does RB biases the base of transistor?
In a class C amplifier, I read that:
"Resistor Rb is connected to the transistor Q1 base. A biasing resistor which connects to the base of Q1 try to pulls the base of transistor further downwards and ...
- 1,074