Alex Lapayev. Analog Input/Output Compensated
Modern processing of audio and video information is almost completely exposed to digital signal processing, which gets more qualitative and cheaper from year to year. However, input and output circuits often remain analog. A clear analog audio and video signal. Everybody knows what is needed for it. Flat frequency response, small linear and harmonic distortions, and linear or uniformly decreasing phase response...
Alex Lapayev. The Fascination of Four Wheels
"The Fascination of Four Wheels" is how a polish engineer Voytsekhovsky called a section in his book "Electronic Toys". This is indeed so, but... until all electronic devices in a car work properly. However, when it gets cold outside some people have to begin their morning jump starting their car from a neighborís car. In the mean time, you look at the poor people indulgently and feel happy to have bought a new high capacity battery (no less than 100 ņH). Yet you notice that the car does not start as easily as it used to in summer. Some time passes, and you too have to call the auto service on a freezing morning...
Alex Lapayev. The 555 MHz compact coil-patch PCB antenna
Itís a true, that a PCB antenna design is very tricky and it is not a piece of cake, but maybe someone could be interested.
Alex Lapayev. The GPS 1.57542 GHz Wi-Fi/BT 2.4GHz Angular Notch printed PCB Filter
The idea was to create a PCB filter that could be take placement space not too much, also, I know that PCB filtering design is very tricky and it is not easy as it seems, but maybe someone could be interested.
Alex Lapayev. The Twelfth (or Sixth) Wavelength Transformer. Introducing, design and calculation
With great respect for Peter (B) Bramham, inventor of the sixth wavelength transformer.
The Reference: P. Bramham, the convenient transformer for matching co-axial lines, (Nov. 1959):http://doc.cern.ch/yellowrep/1959/1959-037/p1.pdf
Alex Lapayev. The Sonnet EDA Touchstone Format
Alex Lapayev. Microstrip Miter Compensation or the Best Bending - Chamfered Routing
When I needed to draw important RF signals in my PCB design, I preferred to use the Swept Bend Method. But there were always at least two haunting problems. Firstly, it has always been difficult to draw and secondary, always this routing took a lot of space. On the other hand, I did know about the Chamfered Routing, but unfortunately I never had enough time to examine this method in detail. Somehow, I took the time and Iím now happy to use this method.