Homework
DUE: Wednesday, Feb.  23,  before class
 

Please show all of your work, and remember, your solutions must be legible. The points for each problem are noted on the problem statement.

1. (10 pts) The clock source you used in lab has an open-collector output. The equivalent looks roughly like above.
The current source turns on when the output should be "0" and turns off when the output should be "1".
1. Assume the current source is initially on, and turns off at time t=0. Write the expression for the voltage Vout as a function of time t.
2. The current source turns back on at time t=20µs. Write an expression for the voltage Vout as a function of time t.





 
2. (10 pts) An inverter drives a 50pF load. The rise time of the inverter is 1ns. The power supply is 10ns away (time for current to get from the power supply to the inverter). The inverter has a 0.01µ F decoupling capacitor across its power and ground leads. When the inverter output transitions high, what is the amplitude of the glitch on the power lead? Assume that all the transient current goes into driving the 50pF load capacitor.