Author - Robert Schell

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Robert Schell	Write for Electronic Design
Rpbert Schell is a graudate student with the Department of Electrical Engineering and Computer Science at the Catholic University of America, Washington, D.C. Email address: rschell@rocketmail.com
2 results found for Robert Schell, displaying items 1 - 2

February 2, 2006 [Ideas For Design]
Make A Frequency Mixer With Op Amps
Frequency mixers are often implemented using a diode bridge or a Gilbert cell. Both types of mixers use a local oscillator (LO) to flip the polarity of the radio-frequency (RF) input. When the LO is positive, the RF input passes to the intermediate-frequency (IF) output without being reversed. When the LO is negative, the RF input is reversed as it passes to the IF output. So, the LO "flips" the polarity of the RF signal. This has the effect of multiplying by +1 or 1 (neglecting losses)....

September 30, 2002 [Ideas For Design]
Counte Resets LRS Generator
A linear-recursive-sequence (LRS) generator produces binary sequences using a shift register and feedback through an exclusive-OR gate. The sequence length equals 2N1, where N represents the number of registers. The generator cycles...