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Exploring the Wonders of Linear Optocouplers: A Comprehensive Guide

Linear optocouplers are versatile components that exhibit non-linear behavior due to the diode nature of the LED. This article delves into the intricacies of linear optocouplers, their circuit configurations, and applications in various electronic systems.

Understanding Linear Optocouplers

⚑️Optocouplers exhibit non-linear behavior due to the diode nature of the LED.

πŸ”ŒThe circuit includes a voltage buffer, LED, load resistor, and optocoupler wired as an emitter follower.

πŸ”§Placement of the load resistor can be on the high or low side based on preference.

Oscillator Creation and Stability

πŸ”„Op amp feedback ensures equal plus and minus signals, leading to oscillator creation.

πŸ”ŠAdding a 0.1 microfarad cap dampens oscillation, maintaining stability but increasing response time.

πŸ“ˆDelay between input and output is increased for stability, resulting in straight lines.

Enhancing System Isolation

πŸ”’Isolating the system while allowing voltage to enter feedback using two optocouplers in series.

πŸ”„Driving two optocouplers in series to ensure equivalent feedback from matched devices.

πŸ”§Ensuring that everything remains on one side of the line for system stability.

Historical Insights and Advanced Applications

πŸ•°οΈDevelopment of optocouplers traced back to Hewlett Packard Opto Electronics division.

πŸ“Mention of application note on optocouplers by various companies like Avago and Broadcom.

FAQ

What is the main reason for the non-linear behavior of optocouplers?

The diode nature of the LED causes non-linear behavior.

How can oscillation be dampened in a linear optocoupler circuit?

Adding a 0.1 microfarad cap can dampen oscillation.

Why is it important to match feedback from optocouplers in series?

Matching feedback ensures system stability.

Which company is credited with the development of optocouplers?

Hewlett Packard Opto Electronics division.

Where can one find detailed application notes on optocouplers?

Various companies like Avago and Broadcom provide application notes.

Summary with Timestamps

βš™οΈ 0:21Exploring non-linearity in analog signal transmission through an optocoupler in an emitter follower configuration.
βš™οΈ 2:32Explanation of op amp feedback and oscillator creation with damping for stability.
βš™οΈ 5:18Utilizing a dual optocoupler setup to maintain isolation and enable feedback in a circuit.
πŸ” 8:16Discussion on historical development of optocouplers and circuit adjustments.

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