PowerWise® Design University
High Speed Amplifiers for Video Applications
An op amp's output current sourcing capability is the greatest when:
Output is at mid-rail
Output has the biggest headroom from V+
Output has the biggest headroom from V-
Output is at or near V+
Putting one or more diodes inside the feedback loop of a video amplifier block (similar to page 7 of the 2nd section of the seminar and shown below for reference), would enable you to:
A. Temperature compensate your design
B. Make the output more sensitive to temperature variations
C. Swing to ground at the output even if the op amp used is not Rail-to-Rail output
Both B & C
An op amp's input signal is AC coupled to its non-inverting input. The input signal is a square wave with duty cycle varying form 0% up to 100%. Assuming the input is biased properly, what is the maximum possible peak-to-peak input voltage that would not be distorted at the output?
¼ of the total op amp's input voltage range
1/3 of the total op amp's input voltage range
2/3 of the total op amp's input voltage range
½ of the total op amp's input voltage range
Will a high speed Current Feedback amplifier stage will always benefit from lower values of feedback resistor?
Yes
No
