Viewing Square Wave on Computer Screen: Signal Reduction by 10 dB Explained

[2slowtogofast]

Homework Statement

If you had a function generator that generated wave forms so you could veiw them on a computer screen and it was showing a square wave with and input signal of 1V (amplituded 0.5 V) What would it look like if the signal was reduced by 10 dB.


not sure what to do with this can someone help me get started

 

[berkeman]

Homework Statement

If you had a function generator that generated wave forms so you could veiw them on a computer screen and it was showing a square wave with and input signal of 1V (amplituded 0.5 V) What would it look like if the signal was reduced by 10 dB.


not sure what to do with this can someone help me get started

The gain (or attenuation) in dB for voltages and currents is given by the equation:

G(dB) = 20 log(V1/V2)

(for power gain, it's 10 log(P1/P2)

http://en.wikipedia.org/wiki/Decibel

So put your gain ratio on the LHS of the voltage gain equation, and solve for the ratio of voltages that gives you that gain...