Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Soldering it is not an issue for me, but thank you
1653055192
I have found a similar IC, from all mighty TI PCM2704C which also can drive headphones but also can be connected to external power amplifier, they warn about mathcing input impedance of amplifier
But PCM output is directly the DAC...
Hello
I intend to use this IC CM102S, which is a USB audio with built-in amplifier 2W
I need more power so I want to use another amplifier , somethink like 10 W - PAM8106
My question is : could I connect in series these two amplifiers : the output of CM102 to be connected to the inputs...
"What you need to look for:
* What is the output signal of your ISDxxxx (how is it defined in range an offset)
* What is the operational input voltage of your amplifier (range, impedance)"
ISD output signal is a current of max 3mA when Vdd=4.5V and R=390 Ohms
I have looked on it with a...
This is ISD schematic,
The AUD pin has only a 3k3 to GND conected. And this voltage is fed to PAM4803 board on G and R pins
and this - which was not designed but bought,
Hello
ISD1600B is a record and playback IC that also has internal amplifier so you can connect a speaker directly to it . And also has an output to drive an external amplifier.
The output is single ended current ouptut .
I have an external amplifier with PAM8403 (that GF1002 pcb) .
On the ISD...
Hello all and thanks for the answers...
My "100% analog" idea was in fact microcontroller-less. Or at least something with the least amount of configurations; like a preprogrammed MCU-based IC that does what I need l; it can have some one-time configurations over an UART or similar.
I do not...
Hello
Consider the application of a microinverter with input from solar panel 20-45 V dc (or similar) and output 230V ac into the grid, power 300-500 W. MPPT feature also needed.
Do you know any 100% analog solution, without involving microcontrollers?
the ideal solution would be a single IC...
Hello
I need a sine wave generator capable of :
50 Hz frequency output (precision not that important)
output voltage stability: +/-0.03 % (output voltage ~3V dc)
What topology do you recommend in order to achieve such high stability of the sinusoidal output voltage?
Yes, the op-amps have internal protection diodes but I would not want to blow them because the chip would be useless then, that is why I want to use external diodes which has higher rating power.
The resistors are standard SMD 1206 which have 200V rating.
I don't fully understand the...
That schematic can be used with the first op-amp and SD converter, with both op-amps and SD converter, with the second op-amp and SD converter, and just with the SD converter.
I want to test all configurations , using the same board by putting or not some 0R resistors
For the first op-amp...
It is limited only at the input of the first op-amp. If I am going to use R75 , there will be this voltage divider which will feed the second op-amp. Now the inputs of this second op-amp are not clamped.
When using R75(namely the second voltage divider, the output of the first op-amp is...
I am working on 3 phaseAC machine inverter.
For measuring the motor phase voltages I use the following circuit
In my project the op-amps supply voltage is +/-5VDC; the inverter module supply voltage is +15VDC. These power supplies are deried from an isolated +5VDC supply. So the op-amps and...
@KlausST : Thank you, My mistake was to consider R2 as being tied to GND
@Audioguru: That it is not the schematic of a real circuit, just a simulation. If the power supply it is not shown it does not mean that it is inexistent. And by convention 5V means +5V.
I don't know anywone who will...
I need some help in deriving the output voltage of the following circuit
My calculations does not seem to match the simulations
I have computed the output voltage as
(K1/K3)*V2 - (K2/K3)*V1
K1=R4/(R3+R4)
K2=( R2//R5 ) / ( R1 + R2//R5 )
K3=( R1//R2 ) / ( R5 + R1//R2 )
Numerically it leads me...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
