# 811 series integrated circuits

> hybrid integrated circuits of active filters

**Wikidata**: [Q130526286](https://www.wikidata.org/wiki/Q130526286)  
**Source**: https://4ort.xyz/entity/811-series-integrated-circuits

## Summary
The 811 series integrated circuits are hybrid integrated circuits designed specifically as active filters, manufactured in the Soviet Union by companies like Alfa and Oktyabr. They combine active semiconductor devices (like operational amplifiers) with passive components on a substrate to perform signal filtering functions.

## Key Facts
- **Classification:** Instance of integrated circuit series and subclass of hybrid integrated circuit and active filter.
- **Function:** Designed for use as active filters.
- **Components:** Utilizes operational amplifiers and incorporates 140 series and 153 series integrated circuits.
- **Manufacturers:** Produced by Soviet manufacturers Alfa and Oktyabr.
- **Origin:** Country of origin is the Soviet Union.
- **Standardization:** Complies with the Soviet integrated circuit designation system.
- **Documentation:** Detailed information is available at http://www.155la3.ru/k811.htm (in Russian).
- **Visual Reference:** An image exists at https://commons.wikimedia.org/wiki/Special:FilePath/811ФН1_Рига_(2).jpg.
- **Wikidata Description:** Defined as "hybrid integrated circuits of active filters".

## FAQs
### Q: What are 811 series integrated circuits?
A: They are hybrid integrated circuits from the Soviet Union, specifically designed and manufactured to function as active filters.

### Q: Who manufactured the 811 series integrated circuits?
A: The 811 series was manufactured by Soviet companies, specifically Alfa and Oktyabr.

### Q: What components are used in the 811 series integrated circuits?
A: They utilize operational amplifiers and incorporate 140 series and 153 series integrated circuits as part of their hybrid construction.

## Why It Matters
The 811 series represents a significant development in Soviet electronics, specifically within the realm of hybrid integrated circuits. By focusing on active filter applications, these circuits addressed the need for compact, reliable signal processing solutions in various electronic systems during the Soviet era. Their hybrid nature, combining active and passive components on a single substrate, offered a practical approach to achieving complex filtering functions miniaturized form, contributing to advancements in Soviet communication and control equipment design. Compliance with the Soviet designation system standardized their use and identification within the national electronics industry.

## Notable For
- Being a dedicated series of hybrid integrated circuits specifically engineered for active filter applications.
- Their origin and manufacturing within the Soviet Union by companies like Alfa and Oktyabr.
- Their hybrid construction combining operational amplifiers with other integrated circuits (140 series, 153 series).
- Compliance with the standardized Soviet integrated circuit designation system.
- Their documented existence and technical details available in Russian sources.

## Body
### Classification
- The 811 series is an **integrated circuit series**.
- It is a **hybrid integrated circuit**, combining different semiconductor devices and passive components on a substrate.
- It functions specifically as an **active filter**.

### Components
- Utilizes **operational amplifiers** as a core active component.
- Incorporates **140 series integrated circuits**.
- Incorporates **153 series integrated circuits**.

### Manufacturers
- Manufactured by **Alfa**.
- Manufactured by **Oktyabr**.

### Technical Details
- **Country of Origin:** Soviet Union.
- **Compliance:** Follows the **Soviet integrated circuit designation** standard.
- **Documentation:** Described at the URL http://www.155la3.ru/k811.htm (qualifier: language Russian).
- **Visual Reference:** An image is available at https://commons.wikimedia.org/wiki/Special:FilePath/811ФН1_Рига_(2).jpg.
- **Wikidata Description:** "hybrid integrated circuits of active filters".