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7A11: Difference between revisions
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Their secrets were Al DeVilbiss and a faster IC process. We had neither. | Their secrets were Al DeVilbiss and a faster IC process. We had neither. | ||
The star-crossed [[7A12]], which was supposed to be the dual trace flagship of the original plugins, was only 105 MHz, not the hoped-for 150 MHz. | The star-crossed [[7A12]], designed by [[Roy Hayes]]which was supposed to be the dual trace flagship of the original plugins, was only 105 MHz, not the hoped-for 150 MHz. | ||
That was partially due to the fact that it used the existing Tek IC process (about 1 GHz). The HP IC process was about 3 GHz. | That was partially due to the fact that it used the existing Tek IC process (about 1 GHz). That was a bad decision on day one. The HP IC process was about 3 GHz. | ||
The 7A11 used discrete NPN and PNP transistors with 4 GHz f<sub>t</sub>. | The 7A11 used discrete NPN and PNP transistors with 4 GHz f<sub>t</sub>. | ||