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1A2: Difference between revisions
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discontinued 1975 not 74
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David Wise (talk | contribs) m (discontinued 1975 not 74) |
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caption=1A2 front view| | caption=1A2 front view| | ||
introduced=1964 | | introduced=1964 | | ||
discontinued= | discontinued=1975 | | ||
series=[[500-series scopes]]| | series=[[500-series scopes]]| | ||
manuals= | manuals= | ||
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circuits have few details in common. | circuits have few details in common. | ||
The 1A2 remained available until the [[500-series scopes|500-series scope line]] was discontinued | The 1A2 remained available until the [[500-series scopes|500-series scope line]] was discontinued. | ||
The 1A2 uses a [[7586]] [[nuvistor]] at the front end as a cathode follower. Then one input of an NPN differential amplifier is driven to produce a differential current-mode signal at the collectors. Silicon diodes form an analog multiplexer that switches between the two inputs. A cross-coupled pair of PNP transistors forms a multivibrator that generates the voltages that control the diodes that select the input channel. | The 1A2 uses a [[7586]] [[nuvistor]] at the front end as a cathode follower. Then one input of an NPN differential amplifier is driven to produce a differential current-mode signal at the collectors. Silicon diodes form an analog multiplexer that switches between the two inputs. A cross-coupled pair of PNP transistors forms a multivibrator that generates the voltages that control the diodes that select the input channel. | ||