3,564
edits
155-0076-00: Difference between revisions
Jump to navigation
Jump to search
no edit summary
(→Photos) |
No edit summary |
||
| Line 84: | Line 84: | ||
The voltage on pin 1 is compared with the 3.0 volt reference. | The voltage on pin 1 is compared with the 3.0 volt reference. | ||
When the input is not overloaded, the 0.1 mA tail current of Q33/Q34 is steered to the Q33's side and Q32 is cut off. | When the input is not overloaded, the 0.1 mA tail current of Q33/Q34 is steered to the Q33's side and Q32 is cut off. | ||
When the input is overloaded, the voltage at the base of Q33 dips below 3.0 volts, and | When the input is overloaded, the voltage at the base of Q33 dips below 3.0 volts, and the tail current is steered to Q34's side. | ||
This turns on Q32. | This turns on Q32. | ||
Thus, the collector current of Q32 is essentially a digital signal: on means overload, off means no overload. | Thus, the collector current of Q32 is essentially a digital signal: on means overload, off means no overload. | ||