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Function: |
Adjusts the gain of an amplifier chain, often to prevent overdrive of components downstream from the VGA. VGAs are common in systems that need to handle a wide range of signal levels. |
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Products |
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1. gain stages plus PIN diode attenuators (constant P out as gain decreases) |
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2. IVA-05, IVA-14 (Power decreases as gain decreases)
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These ICs combine a Gilbert cell-based amplifier followed by an active attenuator to form a variable gain amplifier. Full gain is provided when no control voltage is applied. These amplifiers also have very good limiting properties, and have proven extremely useful in fiber optic receivers.
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3. HMMC gain stages plus attenuators (millimeter wave, instrumentation)
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4. HPMX-3002 (Power control for 800 - 900 MHz frequency range) |
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Key Parameters |
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frequency range |
 graph |
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gain [G 1dB ] |
graph |
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P 1dB |
graph |
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bias [ V, I ] |
graph |
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gain control range |
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power out vs. gain characteristic
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