Here are various topics that may be of interest. Generally the top item in each category is the most recent.

Amplifiers

• Stabilize the 74AC04 Limiter with a Tracking Threshold

Hardware

• Inside the GDS-2204 Digital Oscilloscope

• GDS-2204 Digital Oscilloscope Construction

Measurement

• Precision Envelope Detector with 0.032% Total Harmonic Distortion (THD)

• An invention that changed an industry: Phase Margin Analysis.
  A detailed description is in the IEEE paper "Effect of Bitshift Distribution on Error Rate in Magnetic Recording" (2.9MB pdf)

Oscillators

• SPICE Analysis of Crystal Oscillators

Phase-Locked Loops

• MC4046 Phase Frequency Detector Offset

Public Service

• Make A Simple Balloon Valve To Bleed And Flush Your Brakes

• Kill cold and flu viruses with the most effective antiviral and antibacterial substance available. Here are mirrors for Silversol:
  http://www.pstca.com/silversol/index.htm
  http://silversol.110mb.com/index.htm
  http://silversol.net63.net/index.htm
  http://silverions.tripod.com/index.htm

SPICE

• SPICE is one of the most valuable tools for design and analysis, and LTspice is of the best. It is free and runs on Windows and Linux under WINE. Fluency in LTspice is a requirement for employment in engineering in many companies, including Precision System Technologies. You can download it here : http://www.linear.com/designtools/software/. (Don't forget the Users Guide, Getting Started Guide, and Demo Circuit Collection.)

• The Yahoo LTspice forum moderated by Helmut Sennewald has over 17,000 members with hundreds more joining each week. It is an invaluable forum for learning about LTspice. You can join here: http://tech.groups.yahoo.com/group/LTspice/ With all the new members, it is important to minimize Helmut's workload. Be sure to read the FAQ and learn how to do a search before posting questions that may already have been answered.

• The eCircuit SPICE center is an excellent site for learning analog circuit design and analysis. It has tons of SPICE circuits with a brief description of how they work. You can start here: http://www.ecircuitcenter.com/index.htm

Precision System Technologies supplies high-performance data acquisition and analysis systems for automated manufacturing, production test, and process control. For additional information, please contact PST