Mixer Performance Simulations: Difference between revisions
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*Edit the properties of the RF port | *Edit the properties of the RF port | ||
**Set the '''Resistance''' to 50 Ω and the '''Port number''' to 1 | **Set the '''Resistance''' to 50 Ω and the '''Port number''' to 1 | ||
**Set the '''Source type''' to dc | **Set the '''Source type''' to '''dc''' | ||
**Click OK | **Click OK | ||
*Edit the properties of the LO port | *Edit the properties of the LO port | ||
**Set the '''Resistance''' to 50 Ω | **Set the '''Resistance''' to 50 Ω | ||
**Set the '''Port number''' to 2 | **Set the '''Port number''' to 2 | ||
**Set the '''Source type''' to sine | **Set the '''Source type''' to '''sine''' | ||
**Fill in the '''flo''' for the ''' | **Fill in the '''flo''' for the '''Frequency name 1''' | ||
**'''Frequency 1''' should be either 2.2 GHz (for low-side injection) or 2.6 GHz (for high-side injection) | |||
***This is the frequency of the local oscillator signal | |||
**Fill in '''Amplitude 1 (Vpk) with the amplitude of your LO signal | |||
**Click OK | |||
*Edit the IF port | |||
**Set the '''Resistance''' to 50 Ω and the '''Port number''' to 3 | |||
**Set the '''Source type''' to '''dc''' | |||
**Click OK | |||
*In the Analog Design Environment, enable the '''pss''' analysis | |||
**Verify that only '''flo''' is displated in the '''Fundamental tones''' section | |||
**Select '''Beat Frequency''' and click '''Auto Calculated''' | |||
**Select '''Number of harmonics''' under '''Output harmonics''' and fill in the value of 0 | |||
***This number of ourput harmonics is required by the pxf analysis that we will use to perform the conversion gain simulation | |||
**Set the '''Accuracy Defaults (errpreset)''' to '''conservative''' | |||
**Set the '''Additional Time for Stabalizatoin (tstab)''' to a time larger that the settling time of your system | |||
***Run a short '''tran''' simulation to find the time when all of the voltages in your mixer have settled and there is no "ringing" | |||
**Click OK | |||
Revision as of 13:52, 7 April 2011
Conversion Gain
- You must first instance ports for the RF, LO, and IF ports of the mixer (
analogLib -> Sources -> Independent -> port). If your mixer requires differential inputs/outputs then refer to the separate tutorial on how to drive differential signals. - Edit the properties of the RF port
- Set the Resistance to 50 Ω and the Port number to 1
- Set the Source type to dc
- Click OK
- Edit the properties of the LO port
- Set the Resistance to 50 Ω
- Set the Port number to 2
- Set the Source type to sine
- Fill in the flo for the Frequency name 1
- Frequency 1 should be either 2.2 GHz (for low-side injection) or 2.6 GHz (for high-side injection)
- This is the frequency of the local oscillator signal
- Fill in Amplitude 1 (Vpk) with the amplitude of your LO signal
- Click OK
- Edit the IF port
- Set the Resistance to 50 Ω and the Port number to 3
- Set the Source type to dc
- Click OK
- In the Analog Design Environment, enable the pss analysis
- Verify that only flo is displated in the Fundamental tones section
- Select Beat Frequency and click Auto Calculated
- Select Number of harmonics under Output harmonics and fill in the value of 0
- This number of ourput harmonics is required by the pxf analysis that we will use to perform the conversion gain simulation
- Set the Accuracy Defaults (errpreset) to conservative
- Set the Additional Time for Stabalizatoin (tstab) to a time larger that the settling time of your system
- Run a short tran simulation to find the time when all of the voltages in your mixer have settled and there is no "ringing"
- Click OK