Cirrus Logic Brand Guidelines: Patil Systems, Wolfson & Austin’s Audio Chip Designer

A Utah start-up that moved to Silicon Valley.

Cirrus Logic began in 1981 in Salt Lake City, Utah, as Patil Systems, Inc., founded by Suhas Patil. English Wikipedia says the company was reorganised in 1983 by Patil, Kamran Elahian and the venture capitalist Fred Nazem, whose firm provided its first round of financing. In 1984 it moved to Silicon Valley and took the name Cirrus Logic, aiming at chips for the growing personal-computer components market. Michael Hackworth became president and chief executive in January 1985 and led the company until 1999; it listed on the Nasdaq in 1989 under the ticker CRUS.

Its first big business was PC graphics. In the early 1990s, Wikipedia says, Cirrus Logic supplied low-cost graphics chips for Windows PCs, alongside audio converters and chips for magnetic storage. The graphics line ended with the GD546x “Laguna” 3D accelerators, among the few graphics cards to use Rambus memory, and Cirrus Logic left the PC graphics business in 1998. One of its graphics chips lives on in an unexpected place: the open-source emulators QEMU and Bochs both emulate the CL-GD5446 as a standard PCI graphics card.

The audio thread started with an acquisition. In 1991 Cirrus Logic bought Crystal Semiconductor, a supplier of analog and mixed-signal converter chips. Under David D. French, who joined as president in June 1998 and became chief executive in February 1999, the company refocused on chips for consumer entertainment electronics. It spun off its PC modem unit as Ambient Technologies in 1999, which Intel bought in 2000, and in April 2000 it announced that it had completed moving its headquarters to Austin, Texas. Wikipedia lists further audio purchases, including AudioLogic in 1999 and Peak Audio, owner of the CobraNet networked-audio system, in 2001, while later sales trimmed the range: the video products operation became the privately owned Magnum Semiconductor in 2005, and the high-power Apex Microtechnology line, bought in 2007, was sold to investors in 2012. Also in 2007 Cirrus Logic took over the audio chip company Tripath after its bankruptcy.

From Crystal converters to Wolfson’s Edinburgh team.

Today Cirrus Logic describes itself as a maker of high-performance audio and mixed-signal chips. Wikipedia lists its audio processors and converters in smartphones, tablets, laptops, headsets, car entertainment systems, home-theatre receivers and smart speakers, and the company’s own site adds automotive, industrial and prosumer audio. Like the other companies in this series, it is a fabless designer: Wikipedia classes it as a fabless semiconductor supplier, a company that designs its chips but does not run its own wafer factories.

The biggest step in audio came in 2014. Cirrus Logic announced its offer for Wolfson Microelectronics in April and completed the takeover on 21 August 2014, eeNews Europe reported. Wolfson had begun in 1984 as a spin-out from Edinburgh University’s Wolfson Microelectronics Institute, founded by David Milne and Jim Reid; it started with custom chip design work, then built its own audio chips for smartphones and tablets and developed MEMS microphones. Jason Rhode, then Cirrus Logic’s chief executive, said at the time that the deal strengthened its core audio business and added new product categories such as MEMS microphones. In 2021, Wikipedia says, Cirrus Logic bought Lion Semiconductor, and in the same year John Forsyth, previously chief strategy officer, succeeded Rhode as chief executive. Also in 2021 the company announced a collaboration with Elliptic Labs to pair its CS35L45 smart boosted amplifier with Elliptic Labs’ AI virtual sensor software.

Edinburgh remains central to the story. In a July 2026 announcement of a research grant from Scottish Enterprise, the company said Scotland is home to its largest engineering operations outside the United States; the grant supports work on a measurement front-end for smart energy meters. In May 2026 it introduced a family of nine audio converters — analog-to-digital converters, digital-to-analog converters and codecs — for prosumer and professional gear such as musical instruments, podcast interfaces, active speakers and mixing consoles.

Design and documentation.

A fabless chip designer has an unusual problem for a brand: its product is a small, dark square that most buyers never see. The company designs the chip, an outside foundry makes the wafers, and the finished part disappears inside someone else’s phone, television, router or car. The visual language of the category grows out of that gap between what the company makes and what anyone can look at.

One answer is the rendering. Chips appear floating above circuit-board landscapes, lit from below, with traces running off toward the horizon like roads seen from the air. Another is the die photograph: a close view of the silicon itself, often tinted in false colour so that memory blocks, processor cores and interfaces read as separate districts on a map.

A third answer is to show the products the chip ends up in. Reference designs — earbuds, security cameras, smart speakers, displays, small smart-home gadgets — let a designer point to a finished object without claiming it as its own. Developer kits and evaluation boards, photographed on desks next to laptops and cables, speak to the engineers who choose components.

The calendar matters too. Much of the category’s public presentation happens at trade shows such as CES in Las Vegas, Computex in Taipei, Embedded World in Nuremberg and the Hot Chips conference, where booths, demo walls and technical papers carry the brand. Many press releases follow the same rhythm, dated from headquarters and timed to a show. The guides that follow look at how individual companies work within these conventions, and at what can be documented about each one.

Austin, Edinburgh and a mixed-signal pitch.

The company’s own site, read in November 2026, presents Cirrus Logic as solving “the most demanding mixed-signal challenges” for its customers, and places its roots in sound: since 1984, it says, it has built on its “legacy and leadership in audio.” It says it has more than 1,800 employees in 18 locations worldwide and more than 4,480 patents issued and pending; those are its own figures. In March 2026 the company said Fast Company had named it to the magazine’s list of the World’s Most Innovative Companies of 2026, in the corporate social responsibility category.

The shape of the company is easy to trace. It started as a Utah start-up, made its name in PC graphics in the early 1990s, left that market in 1998, and rebuilt itself around audio through Crystal Semiconductor and Wolfson, with Austin and Edinburgh as its two main engineering bases. Its newest work points beyond phones, toward prosumer audio, cars, industrial equipment and energy metering.

For a design guide, Cirrus Logic shows how a chip company can change its whole subject — from screens to sound — and how an acquisition can bring a second home city into its story. Compare Realtek and Synaptics, two other fabless chip designers in this series. For this guide we use a deep slate, a cloud grey and a signal blue with a sans, an unofficial interpretation; no product or logo is reproduced.

Keep Cirrus Logic’s identity on hand — save it to a board in the Made Good inspiration library.