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The '''M377''' is a Tek-made amplifier integrated circuit designed by [[John Addis]]. | The '''M377''' is a Tek-made amplifier integrated circuit designed by [[John Addis]]. | ||
Its initial use was in the | Its initial use was in the [[11A16]], [[11A32]], [[11A33]], [[11A34]] and [[11A52]] plug-ins. | ||
Later, it was also used in the following oscilloscopes: | Later, it was also used in the following oscilloscopes: | ||
* [[TDS410|TDS 410]] | * [[TDS410|TDS 410]] / [[TDS420|TDS 420]] /[[TDS460|TDS 460]] | ||
* [[TDS520|TDS 520D]] / [[TDS540|TDS 540D]] / [[TDS580|TDS 580D]] | |||
* [[TDS680|TDS 680C]] / [[TDS684|TDS 684C]] | |||
* [[TDS520|TDS 520D]] | * [[TDS714|TDS 714L]] / [[TDS724|TDS 724D]] / [[TDS754|TDS 754D]] / [[TDS784|TDS 784D]] | ||
* [[TDS680|TDS 680C]] | |||
* [[TDS714|TDS 714L]] | |||
About the M377, John Addis says: | About the M377, [[John Addis]] says: | ||
<blockquote> | <blockquote> | ||
<p>The M377 was a single channel plugin on a chip with 0 V common mode input and output voltages, | <p>The M377 was a single channel plugin on a chip with 0 V common mode input and output voltages, | ||
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! Components on ceramic hybrid | ! Components on ceramic hybrid | ||
|- | |- | ||
|11A32 || B010100 - B031028 || 165-2089-03 || | |11A32 || B010100 - B031028 || 165-2089-03 || 100 Ω || M377 chip only | ||
|- | |- | ||
|11A32 || B031029 - up || 165-2089-05 || | |11A32 || B031029 - up || 165-2089-05 || 100 Ω || M377 chip only | ||
|- | |- | ||
|11A34 || B010100 - B031044 || 165-2089-04 || | |11A34 || B010100 - B031044 || 165-2089-04 || 200 Ω || M377 chip only | ||
|- | |- | ||
|11A34 || B031045 - up || 165-2089-06 || | |11A34 || B031045 - up || 165-2089-06 || 200 Ω || M377 chip only | ||
|- | |- | ||
|11A52 || B010100 - B010179 || 165-2129-02 || | |11A52 || B010100 - B010179 || 165-2129-02 || 100 Ω || Diode bridge + 50 Ω input R + M377 chip | ||
|- | |- | ||
|11A52 || B010180 - up || 165-2129-03 || | |11A52 || B010180 - up || 165-2129-03 || 100 Ω || Diode bridge + 50 Ω input R + M377 chip | ||
|- | |- | ||
|} | |} | ||
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Output 1 of U310 is in parallel with output 3 of U410. | Output 1 of U310 is in parallel with output 3 of U410. | ||
Output 3 of U310 is in parallel with output 1 of U410. | Output 3 of U310 is in parallel with output 1 of U410. | ||
Note that in the 11A32 and 11A34, the HF ADJUST control voltages are not set identically for the three outputs. | Note that in the 11A32 and 11A34, the HF ADJUST control voltages are not set identically for the three outputs. | ||
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|- | |- | ||
|- bgcolor="Pink" | |- bgcolor="Pink" | ||
| 3 || + | | 3 || +15 V || | ||
|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
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|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
| 6 || | | 6 || −Vin || | ||
|- | |- | ||
|- bgcolor="LightGrey" | |- bgcolor="LightGrey" | ||
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|- | |- | ||
|- bgcolor="Pink" | |- bgcolor="Pink" | ||
| 9 || | | 9 || −5 V || | ||
|- | |- | ||
|- bgcolor="Pink" | |- bgcolor="Pink" | ||
| 10 || | | 10 || −5 V || | ||
|- | |- | ||
|- bgcolor="LightGreen" | |- bgcolor="LightGreen" | ||
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|- | |- | ||
|- bgcolor="Pink" | |- bgcolor="Pink" | ||
| 14 || + | | 14 || +5 V || | ||
|- | |- | ||
|- bgcolor="LightGreen" | |- bgcolor="LightGreen" | ||
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|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
| 19 || | | 19 || −Output 3 || | ||
|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
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|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
| 22 || | | 22 || −Output 2 || | ||
|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
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|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
| 25 || | | 25 || −Output 1 || | ||
|- | |- | ||
|- bgcolor="Yellow" | |- bgcolor="Yellow" | ||
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|- | |- | ||
|- bgcolor="Pink" | |- bgcolor="Pink" | ||
| 31 || + | | 31 || +5 V || | ||
|- | |- | ||
|- bgcolor="Pink" | |- bgcolor="Pink" | ||
| 32 || | | 32 || −5 V || | ||
|- | |- | ||
|- bgcolor="LightGreen" | |- bgcolor="LightGreen" | ||
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<gallery> | <gallery> | ||
M377 as u310 and u410 in 11a52.jpg|M377 in an [[11A52]], as U310 and U410. Each M377 chip has a differential output impedance of 200 Ω. The two chips' outputs are in parallel, driving the output pins of the plug-in with a differential impedance of 100 Ω, or 50 Ω per side. | M377 as u310 and u410 in 11a52.jpg|M377 in an [[11A52]], as U310 and U410. Each M377 chip has a differential output impedance of 200 Ω. The two chips' outputs are in parallel, driving the output pins of the plug-in with a differential impedance of 100 Ω, or 50 Ω per side. | ||
Tek 11a52 m377.jpg|Two M377 chips (packaged as part number 165-2129-03) in an [[11A52]] | Tek 11a52 m377.jpg|Two M377 chips (packaged as part number 165-2129-03) in an [[11A52]] | ||
Tek m377 die.jpg|M377 die | Tek m377 die.jpg|M377 die | ||
1987-02-10 M377 mounted on H2089.jpg | 1987-02-10 M377 mounted on H2089.jpg |