All Questions
Tagged with headphones operational-amplifier
8 questions
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Ideal headphones impedance/sensitivity for op-amp
The maximum output voltage of my audio source is 3 Vpp and the maximum output current of my amplifier (op-amp AD4075-2) is supposed to be 45 mA.
What would be the ideal impedance and sensitivity of ...
- 109
0
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1
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67
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Options for line output doubling as headphone output
As the title says, I'd like a combined line/headphone audio output with the following design criteria:
ideally driven from 5V single supply (12V available, but noisy)
flat frequency response, also in ...
0
votes
1
answer
73
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Tiny/no output from CMOY headphone amp
I've built this little amp around the classic CMOY design, but don't seem to be getting any output except for a tiny distorted signal, in both unity and with 10 kΩ resistor position on the relay.
If I ...
- 103
2
votes
1
answer
140
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Replacing a virtual ground circuit with center tapped transformer
I just bought a cheap headphone amp (those 47 Amp). I aiming to replace the voltage-divider-virtual-ground circuit with a 12v-0v-12v transformer (ofc with rectification). I checked the NE5532's VCC+'s ...
- 125
1
vote
3
answers
761
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Discrete headphone amplifier output stage
What is the role of R13? I tried simulating this circuit using the Falstad simulator and removing it changed nothing.
It is a circuit from Small Signal Audio Design by Douglas Self, second edition.
- 13
1
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1
answer
2k
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Connecting DAC to line out and headphones
I am designing a PCB with a stereo DAC UDA1334BTS and two stereo jacks -- one for "line out" and the second one for headphones. My original plan was to connect the DAC output both directly to the "...
2
votes
2
answers
1k
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using headphones as microphone
I am learning about headphones and microphones and I have 2 questions.
I bought a few pairs of headphones from the dollar store and took one pair apart. There is a weak little magnet in the center ...
- 177
0
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2
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3k
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Does audio OP-AMP circuit needs output capacitors?
I saw schematics with and without output capacitors. So in the end - do you really need capacitors in the output?
I am using OPA2134 operational amplifier. I plan to use it both as headphone and ...
- 365