Mixer Design Specifications

 

 

§         NF < 10dB (It is a homodyne/Direct Conversion Architecture, NF can only be DSB.)

§         Voltage Conversion Gain > 8dB  

§         Double Balanced Mixer

§         IIP3 > -5dBm

§         For LO = 300 mVpp (input to the LO buffer) and Power(RFIN) = -30dBm (10 mV peak)

LO leakage at RFIN < -25dBm (whatever Voltage you get across the capacitive load, convert it to dBm assuming it is feeding a 50 ohm differential load)

LO leakage at IFOUT < -20dBm (whatever Voltage you get across the capacitice load, convert it to dBm, assuming it is feeding a 50 ohm differential load)

Please assume 1% mismatch (in W/L) at each differential pair (LO and RF inputs).

 

Input and Output Interfaces:  The impedance of the source that drives the mixer is the impedance seen from your LNA output. Please measure the differential output impedance (Zout_LNA) of your LNA and model it as the impedance of the signal source driving your mixer at the frequency range of interest. The single ended output load of your mixer is a capacitor of 5 pF. You may assume the LO_buffer is similar to your LNA.  

                     

  

Simulations: The specifications given above are for ‘tt’ (typical, typical process) and 25°. You also have to simulate your design at ‘ss’ corner, 1.65 V, 85 C and for ‘ff’ corner, 1.95 V and -40° .

Submission:  You have to submit the following materials on October 29th, 2004

§         Transistor level schematic of your design

§         Top-level schematics for all test setups. (Before you submit your design, please create a symbol for your LNA and bring out all input, output, power supply and bias pins. Then create top-level test benches, and submit them with your design. You don’t have to submit the same schematic again and again since you are simulating for different corners or different temperature.)

§         Simulation results at all temperatures and corners. Please make a table of the results for different corners and temperatures.

 

Please submit all your works in one pdf or postscript file. You don’t need to make any hardcopy submission, unless you have to or want to show any calculations. If you are working in groups, please cc with the e-mail and the name of your partner. 

 

Links

§         http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1919/ln/