155-0078-00

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The 155-0078-xx is a Tek-made broadband vertical amplifier integrated circuit in a minipac package. The input and output are differential. It uses the "ft doubler" circuit invented by Carl Battjes.

The 155-0078 was designed by John Addis for the 485 scope (Note 1), which uses no less than 18 of these chips in various grades.

The last two digits of the 155-0078-xx part number are determined by a selection process after manufacture. These characteristics are summarized below:
SUFFIX SPEED DC CHARACTERISTICS REPLACEABLE BY
00 Fast Best ----
01 Fast Third best -03,-00
02 Fast Most relaxed -01,-03,-00
03 Fast Second best -00
04 Slow Same as -00 -00
05 Slow Same as -01 -03,-00,-07,-04
06 Slow Same as -02 -01,-03,-00,-05,-07,-04
07 Slow Same as -03 -00,-04
10 Fast Best ----
11 Fast Third best -13,-10
12 Fast Most relaxed -11,-13,-10
13 Fast Second best -10
Sometimes an instrument will contain a better grade of part than called for in the manual.

The manual should be consulted for the correct replacement type.

Furthermore, it also comes in 14-pin DIP, as 155-0273-00 and 155-0274-00 (slower grade).

Pictures

Used in

Notes

  • Note 1: See John Addis quote in 7A11 article