http://ridwan.chendarma.com Ridwan Chendarma's Personal and Technical Blog Fri, 26 Mar 2010 06:29:05 +0000 http://backend.userland.com/rss092 en Finally completed my master project thesis. http://ridwan.chendarma.com/2010/03/25/completed-master-in-ee/ Look at this tiny chip. It is a RF to IF downconverter before demodulator. Today's chips are getting smaller and smaller. It has a build in adjustable LNA, mixer, filter. I did not get the FM demodulator since I am planning to use this chip to implement an FM receiver ... http://ridwan.chendarma.com/2009/05/23/fm-demodulator-chip/ Implemented ADC DAC 2 MSPS on Virtex II Pro FPGA. This is a 10 times higher in sampling rate compare to the previous post ADC DAC. The sampling rate is 2 MSPS and can go up to 4 MSPS. So by using System Generator and a verilog blackbox I implemented an ... http://ridwan.chendarma.com/2009/05/12/adc-dac-2-msps-implementation-on-virtex-ii-pro-fpga/ I recently experienced this error while using MATLAB. Error using maple... Error integer too large in context ... This happens when I try to simulate an ESPRIT DOA estimation using atan function with symbolic expressions. The solution is to use: clear maplemex % this ... http://ridwan.chendarma.com/2009/04/18/matlab-error-integer-too-large-in-context/ A simple app. using PIC18F4520 to display frequency and period measurement of an analog square wave input. Code is written in C, interrupts and internal timer1 are utilized. Display is on 2 lined LCD screen. Schematic: http://ridwan.chendarma.com/2009/03/18/microcontroller-app-freq-and-period-measurements/ DSB-SC modulation implemented using Analog Devices ADC DAC 200 ksps on Virtex 2 FPGA. http://ridwan.chendarma.com/2009/02/21/dsb-sc-modulation/ Just got this microchip microcontroller sdk today. It's the 18 series. I can't wait to start playing with it. http://ridwan.chendarma.com/2009/01/14/microcontroller-from-microchip/ I have recently join a research project group whom are working on antenna angle of arrival estimation. I believe the research project has been in its 4th year and I am currently learning on all methods or approaches to estimate the angle of arrival of the desired signals. This is ... http://ridwan.chendarma.com/2009/01/14/angle-of-arrival-estimation/ I am starting to work on my master project/thesis now. I am feeling energetic and cannot wait to get things to work! I do have a topic in mind but may change as I progress. http://ridwan.chendarma.com/2009/01/06/officially-start-on-my-master-thesis/ I was testing on this ADC DAC chipsets at the Lab. Analog sent two each with next day delivery for free. Otherwise those can run to about 200 bucks. Kudos to Analog. http://ridwan.chendarma.com/2009/01/05/adc-dac-chipsets/