publicationd/204/6november1986 provisionalissue ... · title: fx204.pdf author: john subject: fx204...

.- Island Labs PRODUCT INFORMATION Publication D/204/6 November 1986 Provisional Issue Features 'EI' Applications o *Variable Split Band 0 Frequency Domain Speech 0 300-3400Hz Bandwidth Scrambler e Programmable Split Frequency 0 Fixed Code Scrambler 0 Crystal Oscillator Stability 0 Rolling Code Scrambler 0 Single CMOS Chip in 28-Lead o For Cellular Telephones Package Mobile Radio 0 Single 5 Volt Supply Cordless Telephones HIGH BAND OIP ll-- — — ::___.__ -| HIGH BAND IIPZ l CLEAR/lNVERT l meri/nama Hug _J L— Frueeg‘fi'g‘l “fig-{j —> mala/sam) in, t: t. «I. fivfÄŽ: ' xTAL/cLocx ___ we: ‘—>B. ”MP”? mer— osgm'fon ß ”fig“ P—‘pa’ AMP o/P LW-w r a ____hm FX204 { j ‘16. %‘ =TESTO/P Levy/amp _v Lang + + ačgäą'äv 1 FEVER -> Lava/sane LOW “:50“ 'J i- " Ĺălw BAND l I 'P Hg. 1 Interna! Block Diagram om r Brief Description The FX204 is a two-band frequency inversion device intended for use in speech scrambling applications. The FX204 uses switched capacitor filters to split the voice spectrum into high and low frequency bands and balanced modulators to invert each frequency band about its own centre frequency. The split point frequency is externally programmable to 32 different points in the range 300 to 3000Hz and makes the FX204 suitable for both fixed programmable and 039 wz rolling code speech scramblers. All filter cut-off frequencies and inversion carriers are derived from a single reference crystal oscillator and facilities are provided to input and output synchronisation tones where required. Constructed in a 5 volt single supply CMOS process and available in 28-pin DIL and surface mount packages, the FX204 is suitable for use in fixed or portable equipment. -fl‘:

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Page 1: PublicationD/204/6November1986 ProvisionalIssue ... · Title: fx204.pdf Author: John Subject: fx204 Keywords: , RF Transistor, Plessey, CML, Created Date: 1/1/2000 7:15:42 PM

.- Island Labs

PRODUCT INFORMATION

Publication D/204/6 November 1986Provisional Issue

Features 'EI' Applicationso *Variable Split Band 0 Frequency Domain Speech0 300-3400Hz Bandwidth Scramblere Programmable Split Frequency 0 Fixed Code Scrambler0 Crystal Oscillator Stability 0 Rolling Code Scrambler0 Single CMOS Chip in 28-Lead o For Cellular Telephones

Package Mobile Radio0 Single 5 Volt Supply Cordless Telephones

HIGH BAND OIP ll-- — — ::___.__ -| HIGH BAND IIPZl CLEAR/lNVERT l

meri/nama Hug _J L— Frueeg‘fi'g‘l “fig-{j —> mala/sam)in,

t: t. «I.fivfÄŽ: '

xTAL/cLocx ___ we: ‘—>B. ”MP”?mer— osgm'fon ß ”fig“ P—‘pa’ AMP o/P

LW-w r a ____hm FX204{ j ‘16. %‘ =TESTO/P

Levy/amp _vLang + + ačgäą'äv 1 FEVER -> Lava/sane

LOW “:50“ 'J i- " Ĺălw BANDlI 'PHg. 1 Interna! Block Diagram om r

Brief DescriptionThe FX204 is a two-band frequency inversiondevice intended for use in speech scramblingapplications. The FX204 uses switchedcapacitor filters to split the voice spectruminto high and low frequency bands andbalanced modulators to invert each frequencyband about its own centre frequency. Thesplit point frequency is externallyprogrammable to 32 different points in therange 300 to 3000Hz and makes the FX204suitable for both fixed programmable and

039 wz

rolling code speech scramblers. All filtercut-off frequencies and inversion carriers arederived from a single reference crystaloscillator and facilities are provided to inputand output synchronisation tones whererequired. Constructed in a 5 volt singlesupply CMOS process and available in28-pin DIL and surface mount packages, theFX204 is suitable for use in fixed or portableequipment.

-fl‘:

https://islandlabs.eu