Simple circuit suits quadrature detection
08.17.2012
A circuit generates an output voltage that you can measure to determine whether two sine waves have a quadrature relationship. Read more...Low-cost RF synthesizer uses generic ICs
6/24/2010
You can make an AM-band frequency synthesizer from standard components. Read More...Achieve simple IR-data transmission from a PC?s serial port
10/11/2007
By transmitting appropriate hex values from a PC's serial port to a pair of IR LEDs, a remote-control IR receiver can enable 38.4-kHz data transmission. Read More...Small, 915-MHz antenna beats monopole
5/5/2003
A 915-MHz data-acquisition project required a small antenna, but the available antennas lacked the necessary characteristics: efficiency, compactness?that is, smaller than a standard 3-in. monopole?with adequate bandwidth, and with amenability to modeling by inexpensive NEC-2 antenna software. Read more...Automotive link uses single wire
4/03/2003
In the automotive industry, in which the goal is to produce cars with simpler, lighter wiring looms, any interface that uses just one wire instead of two offers a distinct advantage. Read more...Use a PIC for automatic baud-rate detection
8/22/2002
Automatic baud-rate detection is desirable in many applications. Microchip's USART module that the company embeds in most of its PIC microcontrollers lends itself to a simple and easily implemented automatic baud-detection scheme. Read more...Chip recorder customizes phone ringer
7/25/2002
Companies usually purchase one type of telephone for all employees, which is understandable, especially if they obtain a discount for buying in quantity. One ringer sound for everyone can pose a problem, though, if the sound of a ringing phone makes a dozen people pause and look at their telephones. Read more...DAA circuit emulates central-office operation
7/8/1998
A modification of a DAA's interface provides central-office-like operation for single-line telephones. Read more...Use power line for baud-rate generation
8/16/2001
One cost-saving measure associated with 8-bit embedded microcontrollers is to use a resistor-capacitor oscillator. Read more?LSFR provides encryption
9/13/2001
LFSRs (linear-feedback shift registers) find extensive use in cryptography. For example, the cryptographic algorithms in the GSM (Global System for Mobile communications) mobile-phone system rely on the use of LFSRs. Read more...Source: http://www.edn.com/design/communications-networking/4397419/Communications-Design-Ideas-Collection
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