ECE315_Feedback2

For voltage-current feedback, the return replicate is

• grounded

• open circuited

For current-voltage feedback, the sense replicate sees

• a short circuit

• an open circuit

Barkhausen's Criteria for oscillation requires magnitude of loop gain and phase of loop gain equal to

• 0 and -90, respectively

• 1 and -90, respectively

• 1 and -180, respectively

• 0 and -180, respectively

For a feedback system to be stable,

• ω_GX < ω_PX

• ω_GX > ω_PX

• PM > 0

• PM < 0

Phase margin is equal to 45^o when

• ω_GX = ω_p2

• ω_PX = ω_p2

• ω_GX = ω_p1

• ω_PX = ω_p1