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7A22: Difference between revisions
low level example signals
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The 7A22 is a single channel differential vertical amplifier for the 7000 series mainframes. | The 7A22 is a single channel differential vertical amplifier for the 7000 series mainframes, produced from about 1969 to 2000. | ||
Remarkably, the 7A22's input sensitivity reaches down to 10 μV/div. Bandwidth is 1 MHz, the upper 3dB limit can be reduced in ×3 steps down to 100 Hz, and the lower bandwidth can be raised in ×10 steps from 0.1 Hz to 10 kHz. | Remarkably, the 7A22's input sensitivity reaches down to 10 μV/div. Bandwidth is 1 MHz, the upper 3dB limit can be reduced in ×3 steps down to 100 Hz (to eliminate noise, inter alia), and the lower bandwidth can be raised in ×10 steps from 0.1 Hz to 10 kHz. A separate control optionally supplies an internal DC voltage to offset the DC signal component. Even in the most sensitive ranges (10 μV/div to 10 mV/div), common-mode voltage can be ±10 V. | ||
Applications | Applications include audio, biological signals, etc. | ||
An example application is found in Jim Williams' [http://cds.linear.com/docs/en/application-note/an124f.pdf Application Note 124] – see Appendix D for a comparison of differential amplifiers. | An example application is found in Jim Williams' [http://cds.linear.com/docs/en/application-note/an124f.pdf Application Note 124] – see Appendix D for a comparison of differential amplifiers. | ||
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<gallery> | <gallery> | ||
Image:tek-7a22-front.jpg | 7A22 front view | Image:tek-7a22-front.jpg | 7A22 front view | ||
Image:tri-1000k_w.jpg | 7A22: 1 kHz, 130 μV<sub>p-p</sub> triangle signal, BW=1 MHz | |||
Image:tri-100k_w.jpg | 7A22: 1 kHz, 130 μV<sub>p-p</sub> triangle signal, BW=100 kHz | |||
Image:tri-10k_w.jpg | 7A22: 1 kHz, 130 μV<sub>p-p</sub> triangle signal, BW=10 kHz | |||
Image:tri-1k_w.jpg | 7A22: 1 kHz, 130 μV<sub>p-p</sub> triangle signal, BW=1 kHz | |||
</gallery> | </gallery> | ||