The Elsie software by Tonnesoft is alright too but I generally prefer AADE’s filter design program. Most of them are very well known already but I will include them here in hopes that someone may find it useful:įor RF LC Filters (like a BPF for a receiver or LPF for a transmitter) I usually use: AADE Filter Design. I would like to share the names of some of the software I use for radio frequency design. LTSpice is excellent too but QUCS is a great resource for RF circuit simulation. It can be difficult to learn but there are some great video tutorials to help. I enjoy using QUCS, as a homebrewer / wannabe / hobbyist RF circuit experimenter. Posted in Software Hacks Tagged circuit, psim, PSpice, qucs, simulation, software, SPICE Post navigation If you’re new to the world of circuit simulation, we went over the basics of using SPICE in a recent Hack Chat. For more details, the Qucs Wikipedia page lists all of the features available, as does the project’s FAQ page.
Qucs has most of the components that you’ll need for professional-level circuit simulation as well as many different transistor models. Qucs runs its own software separate from SPICE since SPICE isn’t licensed for reuse.
#CRYSTAL FILTER DESIGN SOFTWARE DOWNLOAD FREE#
Luckily, there’s a fully featured free and open source circuit simulation software called Qucs (Quite Universal Circuit Simulator), released under the GPL, that offers a decent alternative to other paid circuit simulators.
#CRYSTAL FILTER DESIGN SOFTWARE DOWNLOAD TRIAL#
While it’s easy to get a trial version of something like OrCAD PSpice, this software doesn’t have all of the features available unless you’re willing to pony up some cash. But if you have a more complicated circuit, or if you need to do response modeling or other math on your design before you start building, you’ll need circuit simulation software. Breadboards make it easy to check your circuit for mistakes before soldering together a finished product. What does this mean? It means that the filter will exhibit ringing and phase delays.For simple circuits, it’s easy enough to grab a breadboard and start putting it together. As only the coupling capacitance is varied without varying the terminating impedance, we must expect high ripple at all settings except one. Thierry F1HSU suggests taking a look at Tasa’s site for a tunable quartz filter : Īshhar Farhan VU2ESE suggests that these filter designs are merely a variation of the min -loss cohn filters. A German website also documents results on the bandwidth of these filters, which match with data from the TenTec patent. TenTec has patented a filter design which describes the passband curves of this filter. Karl-Heinz was impressed by the acoustic result of the simple circuitry of his HB-1B and wondered why this alternative had not previously been used? The circuit diagram of the HB-1B can be found here. The bandwidth can be continuously changed using varicap diodes. This transceiver has a quartz filter of variable bandwidth. Karl-Heinz has a CW transceiver HB-1B from Youkit. Karl-Heinz acknowledges that these options represent easy solutions for integration into the ♛ITx. Up until now audio filters have largely been adopted by members: either active filters with operational amplifiers or DSP filters with microcontrollers. He has been toying with a variable CW filter. Karl-Heinz DF9RU completed a build of a ♛itx transceiver and found it to be an excellent learning platform. There has been more recent interest on the IOGroups BITX20 list in variable bandwidth filters in the ♛ITx. Some time ago we featured a design from Michael N2ZDB that used a Jones filter design from TenTec to produce a variable filter passband for his BITX40.