2) A discrete-time signal is shown in the figure below. Sketch and label carefully each of the following signals: а) zп — 4] b) x[3 – n] c) r[3n] d) 2[3п + 1] e) a[n]u[3 – n] f) r[n – 2|8[n – 2] g) r[n] + }(-1)"x[n] h) ¤(n – 1)*] 0 1 3 45 -2 -1

Q: I just want to know how the peak is 5.5 since it is ideal diode

A: The question is about finding transfer characteristics of a given circuit.

Q: Rc does not look like a standard resistor value? and what about choosing value for Re, it has to be…

A: The above question is based on BJT circuit analysis.

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).