babydog0
Newbie level 3
When i run LNA simulation, after finished , In Output log, i found "No DC path from node XXX to ground ". and "error" displays next to the balun port. In ADE, i run sp and dc simulation in sequence. i don't know why this happend.
this LNA has a differential CG stage, i directly couple the balun differential outports to the sources of CG MOS, i thought balun can offer a dc path to the CG stage, i don't know if am i right or wrong?
Actually, a balun should have 4 ports, one single-ended port, two differential ports, and a gnd port. But the balun i am using in Spectre only three ports, i don't know if Spectre balun default to include gnd port.
this LNA has a differential CG stage, i directly couple the balun differential outports to the sources of CG MOS, i thought balun can offer a dc path to the CG stage, i don't know if am i right or wrong?
Actually, a balun should have 4 ports, one single-ended port, two differential ports, and a gnd port. But the balun i am using in Spectre only three ports, i don't know if Spectre balun default to include gnd port.