Have a look at this link, see if it helps any.
I don't think with all the racket around today from switch-mode power supplies and other interfering garbage it would be wise to go beyond 6Khz. Imagine listening to Coruso on a 500Hz CW i.f. and 6Khz would be ideal for say a MW radio for receiving speech and music. 3Khz would be ideal for SSB use (Single Sideband), for voice communication 4 Khz would be dandy. With regards to bandwidth it all depends on what fidelity you want, for example for music a bandwidth of say 3Khz is not going to sound very good, the wider the bandwidth the better the sound. there are one or two circuits using a 'transformerless' design, I've even used the ZN414 and it's clones as a IF amplifier and detector with a NE602 front end mixer. This can be done using a transformer to alter the anode (plate) voltage.With ceramic filters you can do away with IF transformers by making the drain or collector load about 2K. As the power output available is a function of the supply voltage, the output power is modulated. Radio transmitter design - In plate modulation systems the voltage delivered to the stage is changed. Most of the work detailed here is focused on the single crystal design tested at 7 and 10 MHz which in practice has proved very successful as an RX band pass filter for qrss.
#Crystal filter design dasal plus#
Phasenregelkreis - Eine Phasenregelschleife, auch als Phase locked loop (PLL) bezeichnet, ist eine elektronische Schaltungsanordnung, die die Phasenlage und damit zusammenhängend die Frequenz eines veränderbaren Oszillators über einen geschlossenen Regelkreis so… … Deutsch Wikipedia The two filter designs investigated are the single crystal plus phasing capacitor (or 'crystal gate' as it is sometimes called) and the lattice filter using two crystals. Phase-locked Loop - Eine Phasenregelschleife, auch als Phase locked loop (PLL) bezeichnet, ist eine elektronische Schaltungsanordnung, die die Phasenlage und damit zusammenhängend die Frequenz eines veränderbaren Oszillators über einen geschlossenen Regelkreis so… … Deutsch Wikipedia
Overview In a traditional superheterodyne radio receiver, most oscillator drift and instability occurs in the first frequency… … Wikipediaįrequenzsynthesizer - Eine Phasenregelschleife, auch als Phase locked loop (PLL) bezeichnet, ist eine elektronische Schaltungsanordnung, die die Phasenlage und damit zusammenhängend die Frequenz eines veränderbaren Oszillators über einen geschlossenen Regelkreis so… … Deutsch Wikipedia Trevor Wadley in the 1940 s and was first used for a stable Wavemeter. Wadley Loop - The Wadley Loop circuit was designed by Dr. AZUSA dated back to the early 1950s and was named after the southern California town (Azusa, California) where the system was… … Wikipedia Superheterodyne receiver - A 5 tube superheterodyne receiver made in Japan around 1955 In electronics, a superheterodyne receiver (sometimes shortened to superhet) uses frequency mixing or heterodyning to convert a received signal to a fixed intermediate frequency, which… … WikipediaĪZUSA - refers to a ground based radar tracking system installed at Cape Canaveral, Florida and the NASA Kennedy Space Center. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( … Wikipedia A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers.
filtre passe bande à cristal, m … Radioelektronikos terminų žodynas It provides a very precisely defined centre frequency and very steep bandpass characteristics, that is a very high Q factor… … WikipediaĬrystal bandpass filter - kristalinis juostinis filtras statusas T sritis radioelektronika atitikmenys: angl. Crystal filter - A crystal filter is a special form of quartz crystal used in electronics systems, in particular communications devices.
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