Blog Archives

Frequency generator based on the LTC6946

A new project is online: A frequency generator from theoretically 0.37 GHz to 3.740 GHz output frequency. It is based on the LTC6946-1 from Linear Technology, an Ultralow Noise 0.37 GHz to 3.740 GHz Integer N Synthesizer with Integrated VCO.

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Interpolation implementation in VHDL

This is a follow up on the previews article on the low and high pass filter designer. An algorithm is developed in order to perform interpolation. The FIR low pass filter from the last post is used in the interpolation

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Low and High pass filter designer for implementation in VHDL

This post is about digital low and high pass FIR filter design in VHDL. Implementing high/low pass filter in the digital domain has a lot of benefits compared to implementations in the analog domain. The VHDL code for an implementation

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Breakout board for the DAC900E a 165 MSPS @ 10 Bit DAC

This breakout board helps me to interface my FPGA with the DAC900E from Texas Instruments. The DAC has 165 MSPS and 10 bits which is quite some speed. The combination FPGA and DAC opens up for experiments with digital signal

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Arduino controlled Frequency Generator 1kHz – 68 MHz

This project is a description of how to build a signal generator with an output frequency from 1kHz to 68 MHz. The frequency generation is handled by a small Programmable Oscillator from Linear Technology the LTC6903. The control of the

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Design of a FPGA PCB including USB2.0 interface and two 80 MHz ADCs

This is my most advanced homemade PCB design until now. The PCB contains a EP3C5E144C8N Cyclone III FPGA from ALTERA, two 8 bit ADCs AD9057 from Analog Devices @ 80 MHz, a FTDI USB2.0 controller and many other things. The

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Build your own Software Defined Radio (SDR)

This project describes how to build you own Software Defined Radio (receiver part). Starting from an antenna, amplifiers, mixer, filter, ADC, FPGA a FM radio signal is received and demodulated in software. All the blocks for amplification, mixing, filtering and

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