miller capacitance allows you to take a cap across 2 nodes and change it to buffer caps on input and output
operational transconductance amps can operate at very high freqs, so wheee

oscillators!
mention of the wheatstone bridge

problem with oscillators is maintinging stability under many different environmental conditions

classical oscillators
pendulum
arm is rigid, does not flex, does not stretch
escapement mechanism at top is tuned to length of pendulum

for electrical, want to put poles just to the left of the y axis and add energy to maintain that
Af(s) = A(s)/(1+A(s)B(s))
a zero on bottom yields an oscillator
A(jw)B(jw) = L(jw) => 1-L(jw) = 0

general form of classical oscillator:
opamp with NI input grounded
I input, ground, and output connected by a delta circuit with impedances Z1 between G and I, Z2 between G and O, and Z3 between I and O
impedances set freq


colpitts osc
ends up with 2 caps and 1 inductor