These instruments were constructed to demonstrate how a wireless receiver could be tuned to respond to a specific complex signal while rejecting others.

The chip incorporates a central processing unit, random access memory and a wireless receiver, all bundled together in a device 1.4 or 2 mm.

Integrated audio equipment has a long history, beginning with the integration of the record player and the wireless receiver.

Even in 1940, many people did not own wireless receivers; whole communities would gather around a single radio to hear a football match.