I got a sick Tektronix 485 oscilloscope for cheap on eBay; here is the first of several troubleshooting/repair/restoration videos, in which I attempt to troubleshoot and repair the input attenuator boards.
An easy repair of an abused HP6216A power supply, purchased for $5 as “not working”!
This week’s analog IQ test leads us down the road of BJT temperature sensors, delta Vbe’s, and diode theory! But how well does the theory hold up in the real world?
|PN junction temperature curves||The Effect of Temperature on Diode Characteristics, Concepts Electronics|
|Accurate Temperature Sensing with an External P-N Junction||Linear Technologies Application Note 137, Michael Jones|
|The Brokaw band-gap circuit, explained by Paul Brokaw himself!||A Transistor Voltage Reference and What the Band-Gap Has To Do With it, A. Paul Brokaw|
|Measured temperature vs Vbe characteristics||What’s All This VBE Stuff, Anyhow?, Bob Pease|