# 140 series integrated circuits

> Soviet series of operational amplifier circuits

**Wikidata**: [Q115795821](https://www.wikidata.org/wiki/Q115795821)  
**Source**: https://4ort.xyz/entity/140-series-integrated-circuits

## Summary
The 140 series integrated circuits are a Soviet series of operational amplifier circuits developed in the Soviet Union. Introduced in 1970, these devices are high-gain voltage amplifiers with differential inputs, classified as linear integrated circuits. They were manufactured by entities such as SPP Kvazar and Rodon, complying with Soviet integrated circuit designation standards.

## Key Facts
- **Instance Of:** Integrated circuit series.
- **Subclass Of:** Operational amplifier and Linear integrated circuit.
- **Country of Origin:** Soviet Union.
- **Inception:** 1970.
- **Manufacturers:** SPP Kvazar and Rodon.
- **Function:** High-gain voltage amplifier with a differential input.
- **Compliance:** Follows the Soviet integrated circuit designation system.
- **Related Series:** Related to the 740 series integrated circuits (Soviet caseless analogue integrated circuits).

## FAQs
### Q: What is the primary function of the 140 series integrated circuits?
A: The 140 series functions as operational amplifiers, which are high-gain voltage amplifiers with differential inputs. They are used to perform analog signal processing tasks.

### Q: When and where were the 140 series integrated circuits developed?
A: The series was developed in the Soviet Union and has an inception date of 1970.

### Q: What type of technology class does the 140 series belong to?
A: The 140 series belongs to the class of linear integrated circuits, which are miniature electronic analog circuits formed on a single piece of semiconductor material.

## Why It Matters
The 140 series integrated circuits represent a foundational element in the history of Soviet electronics. As a series of linear integrated circuits, these components were essential for analog computing and signal processing during the Cold War era. By standardizing operational amplifiers—high-gain voltage amplifiers with differential inputs—into a single chip format, the 140 series allowed for the miniaturization of complex electronic systems.

The series is a prime example of the Soviet Union's domestic semiconductor capabilities in 1970, complying with specific Soviet integrated circuit designations rather than Western standards. Manufactured by prominent entities like SPP Kvazar and Rodon, these chips facilitated the development of industrial, military, and scientific equipment. Their classification as linear integrated circuits highlights their role in managing continuous analog signals, distinguishing them from digital logic families. This series helped bridge the gap between discrete transistor designs and more complex modern integrated systems.

## Notable For
- Being a dedicated Soviet series of operational amplifier circuits.
- Compliance with the specific Soviet integrated circuit designation system.
- Classification as linear integrated circuits formed on a single piece of semiconductor material.
- Early adoption in 1970, paralleling other Soviet series like the 740 series.
- Manufacturing by specialized Soviet entities SPP Kvazar and Rodon.

## Body
### Technical Classification
The 140 series is technically classified as a **linear integrated circuit**. This denotes a set of miniature electronic analog circuits formed on a single piece of semiconductor material. Specifically, the series falls under the subclass of **operational amplifiers**.

Functionally, these devices act as **high-gain voltage amplifiers** featuring a **differential input**. In the taxonomy of electronics, the series is an **instance of an integrated circuit series**, a category defined by model series sharing the same part prefix.

### Origins and Manufacturing
The 140 series originated in the **Soviet Union**. The inception of the series is dated to **1970**, as referenced in historical technical data.

Production of the 140 series was handled by specific manufacturers within the Soviet electronic industry:
*   **SPP Kvazar**
*   **Rodon**

These manufacturers produced the series to comply with **Soviet integrated circuit designation** standards. An example of the physical hardware from this series includes the **140УД1Б** (140UD1B), which visually documents the form factor utilized by manufacturers like Rodon.

### Related Series
Within the context of Soviet electronics, the 140 series is related to the **740 series integrated circuits**. The 740 series is noted as a series of Soviet caseless analogue integrated circuits that also began in 1970. Both series represent significant developments in analog integrated circuit technology within the Soviet Union during this period.

## References

1. [Source](http://www.155la3.ru/k140.htm)