What if a doorbell never needed a battery and still sent signals wirelessly over long distances. This design can turn every ...

It is often required to switch electrical appliances from a distance without being a direct line of sight between the transmitter and receiver. As you may well know, an RF based wireless remote ...

Direct conversion (or low IF) receiver designs have been in existence for many years. They are widely used in mobile phones and cordless telephones because of their simplicity and lower cost. However, ...

If you cultivate an interest in building radios it’s likely that you’ll at some point make a simple receiver. Perhaps a ...

TOKYO--(BUSINESS WIRE)--Renesas Electronics Corporation (TSE:6723), a premier supplier of advanced semiconductor solutions, today announced the development of two 2.4 GHz RF transceiver technologies ...

Designers often choose a super-regenerative receiver—despite its frequency instability and poor selectivity—for battery-powered, short-range, wireless applications in which power consumption is a ...

The relentless drive for higher performance and increased functional integration has ushered in new challenges for managing electromagnetic interference (EMI) in densely packed mixed-signal ...

Specimen is a TRF (tuned radio frequency) receiver utilizing five CX301-A tubes. Circuit appears to be two RF (radio frequency) stages ahead of a detector, and followed by two AF (audio frequency) ...

Marked: "Day-Fan Electric Company / Dayton, Ohio / Serial No. 089 / Type No. 5056". Unit is Tuned Radio Frequency receiver in a mahogany finish cabinet. Five Kellogg 401-A tubes are employed in a ...