Homework Solutions 1

# Homework Solutions 1 - BENG 186B Principles of...

This preview shows pages 1–10. Sign up to view the full content.

BENG 186B Principles of Bioinstrumentation Week 1 Review Solutions Selections from: 2012 Homework 1 2012 Homework 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
BENG 186B Homework 1 SOLUTIONS 1. Consider the following circuit: a 1 a 0 a 2 a 3 2R 2R 2R 2R 2R R R R V out a) Calculate V out as a function of voltages a 3 , a 2 , a 1 , and a 0 . b) Assuming a n only take binary values 0V or 1V, show a table of V out for all possible combinations of the bits a n (i.e. [0000, 0001, 0010, 0011…] where a 0 is the least significant bit). c) What is the resolution of the output V out ? d) What is the worst-­૒case accuracy of the output V out when the leftmost resistor 2R has a relative error of 1%? What are the binary values of a 3 , a 2 , a 1 , and a 0 ? e) What is the worst-­૒case accuracy of the output V out when the rightmost resistor 2R has a relative error of 1%? What are the binary values of a 3 , a 2 , a 1 , and a 0 ? f) In one sentence, what is the function of this circuit?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2. A photodiode is a semiconductor device that can be used as a light transducer. It behaves ideally in the following fashion: ! = ! ! ! !"! + ! ! ! ! ! ! 1 Where: ! ! ! !"! is the positive photocurrent, linearly proportional to the irradiance; ! ! is the thermal voltage, 25mV at room temperature; ! ! is the reverse saturation current, 100nA. a) Find the open circuit voltage V (when the photodiode is not loaded) as a function of ! ! ! !"! . Plot V for ! ! ! !"! ranging from 0 to 1uA. b) At what photocurrent and output voltage is the sensitivity maximum? What is the sensitivity there?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern