# Mixing Two Signals

Discussion in 'Homework Help' started by inneedofhelp, Mar 25, 2012.

1. ### inneedofhelp Thread Starter New Member

Mar 25, 2012
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A circuit that combines two or more signals is called a mixer. In this lab, your goal is to build a mixer that combines the signals generated by two voltage sources, V1 and V2.

V1 is a 1 kHz square wave that varies between 0V and +1V.

V2 is a 5 kHz sine wave that varies between -1V and +1V.

Please design a circuit that mixes V1 and V2 to produce Voutput such that
Voutput ~=1/2V1 +1/6V2

The resulting output should be similar to that shown in Figure 1. The maximum value of the output is approximately 667mv and the minimum value is approximately -167mv

Figure 1. Desired output waveform

Last edited: Mar 25, 2012
2. ### inneedofhelp Thread Starter New Member

Mar 25, 2012
3
0
Hint: Figure 2 shows a simple resistive mixer for combining two signals.
Figure 2. Simple resistive mixer Enter your circuit below, using the appropriate configuration of resistors. Please do not modify the wiring or parameters of the voltage sources -- your goal is to take the signals they generate and combine them, not to change what is generated. Run a 5ms transient analysis to verify the correct operation of your circuit.

Mar 25, 2012
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4. ### crutschow Expert

Mar 14, 2008
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I assume your problem is to determine the correct resistor values. So what do you have so far?