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- Simple mixer circuit - diffpair fed by modulated Iee
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- *the output is v(6)
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- * harmonic analysis done with the following:
- v1 1 0 0v ac 1.0 distof1 0.001
- v2 7 0 0v ac 1.0 distof1 0.001
- *disto dec 20 1.0e3 1.0e8
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- * intermodulation done with the following:
- *v1 1 0 0v ac 1.0 distof1 0.001
- *v2 7 0 0v ac 1.0 distof2 0.001
- *disto dec 20 1.0e3 1.0e8 0.9
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- q1 3 1 4 2 mod1
- q2 6 0 4 2 mod1
- rc1 5 3 10k
- rc2 5 6 10k
- vcc 5 0 10v
- qee 4 7 8 2 mod1
- re 8 2 9K
- vee 2 0 -10v
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- * note - spectre does not implement rb nonlinearities
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- *.model mod1 npn is=1.0e-16 bf=100 this model matches with spectre
- .model mod1 npn is=1e-16 bf=100 cjs=2.0e-12 tf=0.3e-9 cje=3.0e-12 cjc=2.0e-12 vaf=50
- *the above model matches with spectre
- *.model mod1 npn is=1e-16 bf=100 cjs=2.0e-12 tr=6.0e-9 tf=0.3e-9 cje=3.0e-12 cjc=2.0e-12 vaf=50 this agrees with spectre
- *.model mod1 npn is=1e-16 bf=100 rb=100 cjs=2.0e-12 tf=0.3e-9 tr=6e-9 cje=3.0e-12 cjc=2.0e-12 vaf=50 this model causes bad match with spectre
- .end
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