Posts that would interest electrical engineers proficient in analog circuit design.
Response to: ADC in Matlab simulink: The first time I did this I misinterpreted the question, posting a sigma-delta example rather than an integrating (slope) ADC. Anyway, here’s a slope ADC starting point: simulinkslopeadc
I’ve put together a 2nd order continuous sigma-delta Simulink model as a starting point. This is the multi-port feedback configuration (feeds back into input of 1st and 2nd integrators).
Read More..In response to: How can I deal with 3rd HD in a 2nd SigmaDelta Modulator It’s possible that the OTA is limiting you. Doing a matlab model of the sigma-delta and running it should tell you whether it is a circuit problem or a system-level problem. My hunch is that it’s a system-level problem: the […]
I’ve heard for the last 10 years or so that polar modulation will give spectrally-efficient modulation formats (OFDM, CDMA, etc.) the PA efficiency that they so lack nowadays. I agree: polar modulation will give a boost in efficiency—when several problems are solved. Here are the challenges that plague polar modulation
I wrote a set of scripts to make Cadence IC tools & Subversion work together. This requires subversion 1.4 or higher. Red Hat Enterprise Linux 4 by default ships with 1.3. See also Pictorial Introduction to Using Cadence/Subversion for detailed tutorial on usage. This post is mostly about the guts of the scripts. Note: this […]
In response to:Watch Full Movie Online Streaming Online and Download Hi all, I came across a dc biasing problem of a homodyne receiver. The output of the direct conversion mixer is connected to a VGA. The first stage of VGA and the output of mixer have different DC biasing values. I know common source or […]
In my post on Quantization, I noted that quantization noise degrades the performance of analog-to-digital converters (ADC’s). One very effective method of reducing quantization noise over narrow (but increasingly wider) bands is the Sigma-Delta technique. Consider the block diagram shown below: This loop attempts to subtract the error induced by the embedded ADC (called the […]