# 5T OTA Projects at AI Tinkerers

> Canonical HTML: https://aitinkerers.org/technologies/5t-ota
> Markdown URL: https://aitinkerers.org/technologies/5t-ota.md
> Technology record last updated: 2026-04-26T02:15:03Z
> Generated: 2026-08-25T07:24:07Z

The 5T OTA (Operational Transconductance Amplifier) is a fundamental, five-transistor CMOS circuit that converts differential input voltage to a proportional output current for analog integrated systems.

The 5T OTA (Five-Transistor Operational Transconductance Amplifier) is a core analog building block: a voltage-controlled current source. This minimal, single-stage architecture uses a differential input pair and a simple current mirror load, totaling five transistors, for maximum efficiency. It is essential for high-performance integrated circuits (ICs), specifically in applications like $G_m$-C filters, voltage-controlled oscillators (VCOs), and delta-sigma Analog-to-Digital Converters (ADCs). The design is frequently implemented in standard processes, such as UMC 180nm CMOS technology, prioritizing low transistor count and power dissipation while still achieving target specifications like a 44.18dB gain and a 55.11MHz Unity Gain Bandwidth (UGB).

- Official technology site: https://www.mdpi.com/2072-666X/14/9/1781
- Public AI Tinkerers demos and talks: 1
- Result page: 1 of 1

## Recent Public Talks and Demos

### [Analog design co-pilot](https://atlanta.aitinkerers.org/talks/rsvp_cvQ3KvFo4DM)

A few friends and I have built a machine learning model to design a 5-transistor operational transconductance amplifier (5T OTA). Our model takes key inputs from the designer—power consumption, area, and differential mode gain—and generates optimized outputs, including voltages and the length and width of the transistors. We present the results in a clean text format, utilizing llama 3.1 for enhanced processing.

- Event context: AI Tinkerers Atlanta September Meetup — 2024-09-18 — Atlanta
- Public talk page: https://atlanta.aitinkerers.org/talks/rsvp_cvQ3KvFo4DM

## Related Technologies

- [Llama 3](https://aitinkerers.org/technologies/llama-3) ([Markdown](https://aitinkerers.org/technologies/llama-3.md)) — 38 public demos