Issue 324: EQ Questions

Review these four Test Your EQ problems that appeared in Circuit Cellar 324. Test your knowledge. Answers appear in issue 325.

Problem 1: In the following circuit, pick a value for Rx that sets the quiescent voltage at the collector to Vcc/2. The hFE (current transfer ratio) of the transistor is 100, and you can use the approximation that the internal emitter resistance re = 25 mV / Ic.

eq0690_fig1


Problem 2: What determines the low-frequency (high-pass) cutoff frequency of this circuit?


Problem 3: What is the high-pass cutoff frequency?


Problem 4: What is the best way to lower the cutoff frequency while at the same time reducing the loading on the signal source?

— ADVERTISMENT—

Advertise Here

Keep up-to-date with our FREE Weekly Newsletter!

Don't miss out on upcoming issues of Circuit Cellar.


Note: We’ve made the May 2020 issue of Circuit Cellar available as a free sample issue. In it, you’ll find a rich variety of the kinds of articles and information that exemplify a typical issue of the current magazine.

Would you like to write for Circuit Cellar? We are always accepting articles/posts from the technical community. Get in touch with us and let's discuss your ideas.

Website | + posts

Circuit Cellar's editorial team comprises professional engineers, technical editors, and digital media specialists. You can reach the Editorial Department at editorial@circuitcellar.com, @circuitcellar, and facebook.com/circuitcellar

Sponsor this Article

Supporting Companies

Upcoming Events


Copyright © KCK Media Corp.
All Rights Reserved

Copyright © 2021 KCK Media Corp.

Issue 324: EQ Questions

by Circuit Cellar Staff time to read: <1 min