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Hi, I'm stuck with programming a CSR module using a FT232R chip.
I've a chip CSRa64215 mounted on BT625 with I2S output, and this FT232R board.
I have followed this connecting instructions:
1) Downloaded the BlueSuite 2.6.6
2) Replaced "usbspi.dll" with the one found at...
Pick a normal amplifier CFP output stage, with a normal Vbe multiplier.
Normally, in a CFP output stage the Vbe must be matched thermically with the output stage driver.
What if not thermal compensated but with a current sense on power output resistor? (0.1-0.47 5W ohm resistor). It is there...
Hello, I have a trouble in the VAS stage of an amplifier.
The amplifier is powered by +10V _ GND _ -10V. The voltage at the Q5 base should be about 9.2V as simulator said, but it's only about 1.3V.
Measuring under bench power supply, R2 seems to be shorted. And also C1 seems to be shorted...
In analog audio amplifier, what is the calculation to do concerning the degenerative resistances of the differential input emitters?
As I understand it, the degeneration resistors R1 and R2 in the circuit, together with the Cdom (miller compensation) decide the cut-off frequency and therefore...
I have some questions concerning analog audio amplifiers: what is the purpose of resistors R1 and R2 in the Wilson current mirror? With what formula are they calculated? Can they be omitted? If they are omitted, what happens to the VAS (Voltage Amplifier Stage)?
Hello, a question: can a ground plane, create problems in power audio amplifiers?
Example: if touching the input with the tip of whatever, the amplifier oscillates, can it be the fault of the ground plane? (Which is on both layers, bottom and top) Or is it because the amplifier is unstable?
Does anyone know where I can find the ESS Technology DAC libraries?
I want to produce them and I don't want to buy them from China. But I can't find any libraries (schematic and board layout) of these DAC packages. I want anyone of: ES9038, ES9028 and ES9018, better if mobile version. I...
CTRL+L show the error log.
I found how to display the magnitude and phase of every run at specific frequency with this command:
.MEAS ac Vo V(out) at=Freq
How now to implement the IF (Y)dB is > N?
I found db(x) to get decibel variabile, and done command like this:
.MEAS ac Vo V(out) at=Freq...
Yes I know the IF statement but I don't know the syntax for the specific case. How to first of all, (Y)dB at (X)Hz? Then how to save the resistor with MEAS?
Hello, my problem it's a bit complicated.
I want to measure the magnitude (in dB) of the bode plot of a specific frequency after an AC analysis.
In my configuration:
1) I have a circuit (a simple low pass or an high pass filter)
2) I change with the command STEP the value of a resistor
3) For...
[SOLVED] How to beta tolerance in LTspice?
There is a method to set a percent value tolerance of beta of BJTs models in LTspice?
I used function "Worst Case" and "Monte Carlo" for resistors and capacitors:
Worst case function:
.func wc(nom,tol) if(flat(1)>0,nom*(1+tol),nom*(1-tol))...
Vertical MOSFET = Hexfet
The Vbe bias current changes at voltage variating. In many amplifiers this isn't a problem because the voltage swing is little (5V).
My problem is that I've to use my amplifier in car, the voltage swing of the battery changes the output voltage of the transformer of...
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