http://www.itisff.it/dip_eln/tda2030.pdf Couple questions. 1. In the Typical Application diagram on the left there is Vi w/ a 22k resistor. Appears that there's a diode running into the resistor and then the resistor goes to ground. The question is how should I interpret that? The connection isn't on either side of the resistor but literally going into it. How to wire this? Why is this portion dotted? The diode should allow the input signal to pass thru but no current to pass back out, right? 2. The diodes on the circuit between 3 and 5. Over here is a diode cheat sheet. What purpose does the circuit between pins 3 and 5 serve? Should current be flowing towards 3 from 5 or to 5 from 3? Thanks.