Differential amplifier with digitally controlled gain
USH965H · kind H · statutory invention registration
12Cited by
0References
8Claims
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Key dates
| Filing date | — |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | — |
Classification
- Technology area (CPC —)General
Abstract
Differential amplifier having multiple stages, each stage having the gain thereof set by digital control. The gain of each stage is individually controlled, thereby allowing wide dynamic range and gain. Each stage has a differential pair with multiple sets of gain-setting resistors in the emitters of the pair. By selecting which resistor set, or combination of resistor sets, is used, the gain of the stage is controlled. The result is a 4 stage, 0-45 dB gain amplifier for RF or IF applications, with the gain adjustable in 3 dB increments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.