Electronic Design

Paging Tone Decoder IC Touts Programmability

The CMX823 programmable paging decoder IC is a high performance, low power audio tone decoder. It supports tones from 280 kHz to 3.5 Hz and allows users to create their own tone frequency alphabet for ...
Electronic Design

CMOS Switch Matrix Integrates Tone/Voltage Decoder

The SKY13292-365LF, a 4 x 2 switch matrix, combines a digital decoder with the RF switching network and tone/voltage detect within a lead-free, RoHS-compliant QFN plastic package measuring 4 mm x 4 mm ...
EDN

Decoder Device 2 for Dual Tone Multi Frequency

Decoding the telephone-generated DTMF is the purpose of building the DTMF decoder 2 which can be connected directly to a serial port and use a HyperTerminal on a PC to view the digits. A 16×2 LCD ...
Hackaday

In-Band Signaling: Dual-Tone Multifrequency Dialing

One late night many decades ago, I chanced upon a technical description of the Touch-Tone system. The book I was reading had an explanation of how each key on a telephone sends a combination of two ...
Officer

OPTOELECTRONICS INC.

Manufacturer of RF test equipment. Products include nearfield test receivers, frequency counters, frequency recorders, digital RF frequency counter, RF detectors, DTMF decoders and sub-audible tone ...