AI Patent Summary

Patent Document
#US6847904B2
United States Patent
Abstract
A programmable gain amplifier (PGA) controlled through a serial communications interface are fabricated on an inte- grated circuit (IC). A multiplexer (MUX) may also be included on the IC. The serial communications interface controls the gain of the PGA, MUX channel selection, and other functions of the PGA. Status of the PGA may also be obtained through the serial communications interface. By using a serial communications interface, the pin count of the PGAIC package may be kept to a minimum. 44 Claims, 2 Drawing Sheets Gain Setting Resistor Ladder Network ction MEMORY
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Patent Classification & AI Product Mapping
Authoritative patent classification definitions mapped to real-world technology domains and commercial product categories.
CPC H03G3/00
Confidence: High
Official Definition
Gain control in amplifiers or frequency changers
ELECTRICITY > ELECTRONIC CIRCUITRY > CONTROL OF AMPLIFICATION
AI Technology & Product Mapping
Technology Domain:
Analog & Mixed-Signal Integrated Circuits
Product Category:
Programmable Gain Amplifiers (PGAs)
Plain-English Summary:
General systems, circuits, and methods for adjusting or regulating the amplification level of an amplifier or frequency-changing circuit.
Relation to Claims:
Directly aligns with the core disclosure of a programmable gain amplifier (PGA) integrated circuit whose amplification level is controlled via internal circuitry and external interfaces.
CPC H03G3/001
Confidence: High
Official Definition
Digital control of analog signals
ELECTRICITY > ELECTRONIC CIRCUITRY > CONTROL OF AMPLIFICATION
AI Technology & Product Mapping
Technology Domain:
Mixed-Signal Control & Interface Circuits
Product Category:
Digitally Controlled Analog Front-Ends (AFEs)
Plain-English Summary:
Controlling, adjusting, or processing analog signals using digital control lines, commands, or data words.
Relation to Claims:
Matches the patent's teaching of configuring gain settings, multiplexer channel selection, and amplifier parameters via digital data sent across a serial communications interface to internal memory and resistor ladder networks.
CPC H03G3/20
Confidence: Medium
Official Definition
Automatic control
ELECTRICITY > ELECTRONIC CIRCUITRY > CONTROL OF AMPLIFICATION
AI Technology & Product Mapping
Technology Domain:
Analog Signal Processing & Automatic Gain Control
Product Category:
Automatic Gain Control (AGC) & Sensing ICs
Plain-English Summary:
Techniques and circuits for regulating amplifier gain automatically in response to operational states, signal levels, or feedback without direct continuous manual intervention.
Relation to Claims:
Relates to the amplifier's internal circuitry that maintains or modifies operational parameters and reports status back through the serial interface based on circuit states.
CPC H03G3/30
Confidence: High
Official Definition
Automatic control in amplifiers having semiconductor devices
ELECTRICITY > ELECTRONIC CIRCUITRY > CONTROL OF AMPLIFICATION
AI Technology & Product Mapping
Technology Domain:
Semiconductor Integrated Amplifiers
Product Category:
Analog Front-End Integrated Circuits
Plain-English Summary:
Automated gain adjustment specifically implemented within solid-state or semiconductor-based amplifiers such as integrated circuit amplifiers.
Relation to Claims:
Directly applies to the physical embodiment of the PGA, multiplexer, and resistor ladder network fabricated as a monolithic semiconductor integrated circuit.
CPC H03G3/3005
Confidence: Medium
Official Definition
Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
ELECTRICITY > ELECTRONIC CIRCUITRY > CONTROL OF AMPLIFICATION
AI Technology & Product Mapping
Technology Domain:
Low-Frequency & Sensor Signal Conditioning
Product Category:
Audio Signal Processors & Sensor Interface ICs
Plain-English Summary:
Gain regulation within semiconductor amplifiers designed for low-frequency or baseband applications, such as audio signal processing or sensor signal conditioning.
Relation to Claims:
Applies to the low-frequency use cases of the PGA, such as audio gain stages, data acquisition, or transducer interfaces requiring digitally programmable gain switching with low pin counts.