I need input buffer for baxandal tone controller. Schematic is given below
Thanks in advance
Thanks in advance
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I take it you mean input buffer. Use the second half of your output NE5532. Easy-peasy.
Hi. Looking at resistors values , i doubt that you need a buffer at all for 10k input resistance. Most sources are capable of driving loads of 1-2k or even less. If you want , can use any audio opamp, capable to operation with gain of 1 , like 5532 , lm4562 , also there are may opa series . What is your signal source ?
Because of the high impedances, I wouldn't recommend high input noise current op-amps like LM4562. Why are the impedances so high anyway?
Post #1 shows a circuit which inverts signal polarity. Do you seek a buffer which inverts polarity a second time, so the final output has the same polarity as the input signal?
So what's the problem? Add an inverting stage before or after the tone control section. Or check ESP P97.
Gain = -R1/R2
Both resistors can be 10k.
Or if you need a little more gain, R1 can be larger.
With the inverting buffer, the tone output is now in phase with the input.
Both resistors can be 10k.
Or if you need a little more gain, R1 can be larger.
With the inverting buffer, the tone output is now in phase with the input.
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Use this...
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Thank you adason sir & all others friends i really need this one with explanation & you make it easy for me thanks for help & sorry for late reply.
Yes rayma sir i build it yesterday night & it worked great for me thanks for help sir.
Now i wanted to decrease the gain through input buffer of my tone controll so what should i do changes in the buffer?
I also used esp p97 input buffer for my tone controll.
Increase R103/203 or decrease R104/204. The gain is given by 1+R104/103. So you can never get it below 1. If you want less you will have to switch to an inverting buffer.
National Semiconductor / Texas Instruments
Will have countless circuits in their well known Audio opamp datasheets
If using SINGLE SUPPLY power sources they have the sloa42 Application Report
Audio Tone Control Single Supply Application Report sloa42
TL082 Datasheet includes this circuit for 3 band
Otherwise shows the Unity Gain buffer mentioned
OPA1656 Datasheet shows this 2 band
Will have countless circuits in their well known Audio opamp datasheets
If using SINGLE SUPPLY power sources they have the sloa42 Application Report
Audio Tone Control Single Supply Application Report sloa42
TL082 Datasheet includes this circuit for 3 band
Otherwise shows the Unity Gain buffer mentioned
OPA1656 Datasheet shows this 2 band
If you use the inverting buffer circuit, the feedback resistor can be lowered from 10k,
and the gain will decrease from unity in proportion, even all the way to zero.
For example, if the feedback resistor is 5k, and the resistor to ground is 10k,
the gain is -5k/10k or -0.5 (-6dB).
Of course, you could instead use a 10k volume control before the buffer.
and the gain will decrease from unity in proportion, even all the way to zero.
For example, if the feedback resistor is 5k, and the resistor to ground is 10k,
the gain is -5k/10k or -0.5 (-6dB).
Of course, you could instead use a 10k volume control before the buffer.
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Your treble breakpoint has crept down from nearly 5kHz, but I suggest it is still too high at 2.4kHz. Try 1.5nF as the treble capacitor.