CS235947B1 - Integral reproduction amplifier for stereo recorders - Google Patents

Abstract

An integral reproduction amplifier for stereo tape recorders belongs to the field of radio engineering and finds application in the production of integral microcircuits of reproduction amplifiers and their use in stereo tape recorders and also in other radioelectronic devices as a low-noise two-stage amplifier. The aim of the invention is to increase the reproducibility of electrical parameters in production and reduce the criticality to the values of frequency-shaping elements. The presented reproduction amplifier, containing an input, intermediate frequency and output stage on n-p-n type transistors and a bias voltage source on transistors in a diode connection. The topicality of the proposal lies in the introduction between the input and intermediate frequency stage of the reproduction amplifier of three additional transistors, connected by corresponding connections between themselves and the transistors of the input, intermediate frequency and output stages, and also with the bias voltage source. The interaction of the limiting and characterizing features of the present invention ensures the achievement of the set goal. This invention may also find application in other high-quality low-frequency stereo equipment.

Description

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OOPMYJIA H3OBPETEHHH first HHTerpajibHUň ycHJiHTenb BOcnponsBeíxeHHH juih ατβροοφοΗΗ'ίΘσκιιχ μηγηητοΦοηοβ, Kaac ^ HílKaHaji κοτοροΓΟ coflepxHT BtanoJiHenHae to TpaH3HCTOpax npn Tuna BxojiHOň, ducks npoMexyTOHHUfl-ηΗ ycHJIHTeJIH HanpHXeHHH C pe3H CTHB HfcJMH KOJlJieKTOpHblMH Harpy3KaMH h pe3HCTOpaMH napajinenb-HO-nOCJieflOBaTeJlbHOft O6pa6OTKOB CBH3H B UenHX Ča3bl H 3MHTTepa TpaH3HCTOpOB COOTBCTCTBeHHOBXOJJHOrO H ΠρΟΜβΧγΤΟ'ίΗΟΓΟ KaCKaaOB, BbJXOflHOň SMHTTepHblň FIOBTOpHTOJlb flMHaMHUeCKOň Harpy3 C-H KOfl HCTOHHHK CMeiUaiOIUerO ΗβΠρΗΧβΗΗΗ Π-Π-ρ B TpaH3HCTOpOB flHOflHOM ΒΚ-ΠΙΟΗΘΗΗΗ, OTJIHHatOlUHfiCHΤβΜ, ΊΤΟ C líejlbio nOBbBlieHHH BOCnpÓH3BO, HHMOCTH 3 · ΠΘΚΤΡΗΊβΟΚΗΧ napaMeTpOB yCHJIHTSJÍH npn eroHSrOTOBJíeHHH H CTβΗΒΙΐΙβΗΗΗ κρΗΤΗΊΗΟΟΤΗ Κ ΗβΠΗΠΗΗ3Μ HaCTOTHO “<t> OpMHpyiOIUHX 3JieMeHTOB, B yCH ~ jiHTenb Mexfly βχοληημ h npoMexyTOH-HbMH xacKaflaMH nono jiHHTejibHO BBeneHbí nepBbiň, and Βτοροβ τρβ-THN TpaH3HCTOpu, nepBUň H3 κοτορΗΧ npn Tuna ποηκηκί'ίβΗ óa3oň κ KOJineKTopy TpaH3HCTopaBXOflHoro KacKana, κοπηβκτοροΜ - κ h 6aaaM βτορογο TpeTbero TpansucTOpOB pnp Tuna h nepearpeaHCTop - κ τ BMHTTepy βτορογο TpaH3HCTopa KOjmeKTopy TpaHSHCTopa npoMexyTOHHoro KacKafla and BMHTTepOM - κ τοίκθ coejWHeHHH pe3HCTOpOB napajiJiejibHO-nocjieflOBaTenbHOň oópaTHOň cbh3hh nepes ρβ3Μοτορ κ KOnneKTopy βτορογο TpaH3HcTopa h 6a3e TpaH3HCTopa npoMexyTOHHoro KacKa.ua, χοππβκτορ TpeTbero TpaH3HCTopa πολοοθημηθη to oTpHnaTejibHoň unuje HCTo ^ HHKa πητηημη and ero smhtτβρ h óaaa TpaH3HCTopa flHHaMH ^ iecKOfl Harpy3KH βηχοαηογο βμηττθρηογο nóBTopuŤejiH - κ ηοτοηηηκυCMemawmero HanpHxeHHH. Second HHTerpajibHHň ycHJiHTenb BOcnpoH3BeneHHH juih CTepeo <pOHH \ n iecKnx μ3γηητοΦοηοβ no. 1 ^ OTJiH iaKmiHAcH τθμ, ίτο pe3HCTOp b OaaoBOň Nenni TpaHSHCTopa βχοαηογο KacKafla ββιποπηθη 6a-b 3OBOM cnoe p c ^ yMeHbmeHHbíM nonepe HMM cenenneM npn nOMOtun θμηττθρηογο π + οποη . HCTO ^ HHKH ΜΗφθρΜΒΙ | ΗΗ, ΠρΗΗΗΤΜΘ ΒΟ BHHMaHHe ΠρΗ 3ΚΟΠβρΤΗ3β: 1. A. Β. ΓρβόβΗ. npoeKTHpOBaHHe and HanoruHHbix HHTerpaJibHtJX cxeM. . 3, 1976, No. 166, p. 8-12. 2. KaTanor Linear Integrated Circuits Data Book "CUIA. 1976 - προτοτππ.

AHHOTAIXHH MHTerpaJIhHHfl yCHJIHTeJIb ΒΟΟΠρθΗ3ΒθηθΗΗΗ flJIH CTepeO0OHH ^ eCKHX ΜβΓΗΗΤΟφΟΗΟΒ OTHOCHTCHK OČJiaCTH pajXHOTeXHHKH H HaftfleT ΠρΗΜβΗβΗΗβ NPH H3rOTOBJieHHH HHTerpaJIbHHX MHKpOCXeM yCHJIHTe Jiefl ΒΟΟΠρθΗ3ΒβΛβΗΗΗ H-HX HCnOJIb3OBaHHH Β ΟΤβρβΟφΟΗΗΗβΟΚΗΧ MarHHTO $ diphenylethylamino, so »e flpyroňpasHOsneKTpOHHoR annapaType B b K ^ iecTBe ManomyMHiUHx flByxKaHanbHUx YCH-nuTeJieň.

Ueflb Η3θ6ρβΤβΗΗ «- nOBbehHHe BOCnpOH3BOflHMOCTH ΒΠβΚΤρίΠβΟΚΗΧ napaMeTpOB npHjHSrOTOBJIe-HKH H yMeHbIeHHe KpHTH ^ HOCTH K BeJIH ÍHHaM HaCTOTHO-OOpMHpyiOHHX SJeMeHTOB. C Η c c BO c c c c c c ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac ac T T T T T T T T T T T T T T T. HOBHSHa ηρβΛΠΟΜβΗΗΗ 3aKJI »^ íaeTCH B BBefleHHH Me» Fly BXOflHHM npOMeXyTO ^ H-ÍHblMH Kacxa AaMH yCHJIHTeJIH BOCnpOH3BefleHHH Tpex flOnOnHHTenbHfcJX TpaHSHCTOpOB, COeflHHeHHX COOTBeTCTByiO-tyKMH CBHaaMH MeXfly COÓOfl H TpaH3HCTOpaMH BXOflHOTO, npOMeXyTO Horou ^ H BfcJXOflHOTO KaCKaflOB and taxxi hctohhhkom cMemawmero HanpHxeHHH. COBOKynHOCTb OrpaHH ^ IHTeJIbHblX H OTJIH * IHTeJIbHbIX ΠΡΗ3Η3ΚΟΒ npeflnonaraeMOTO Η3θ6ρβΤβΗΗΗoÓecnewiBaeT flOCTHxeHHe nocTasjíeHHoň uenH.

AaHHOe, θ3θ6ρβΤβΗΗβ ΜΟΜβΤ HANTH ΠρΗΜβΗβΗΗβ Η B flpyrHX BHflaX BHCOKOKaHeCTBeHHOÉ HHSKO ^ iaCTOTHoň οτβρβοφΟΗΗ'ίβοκοΑ annapaType.

Claims (2)

235947 6 SUBJECT MATTER 1. An integral reproduction amplifier for stereo cassettes, each channel of which includes in the design of the npn type input and between the frequency amplifier stages the 8 resistive loads in the collectors and the series-parallel coupling resistances of the emitter transistors of the input and frequency stages, the output emitter with dynamic a load and bias source of the npn transistors in the diode circuit, characterized in that in order to increase the reproducibility of the electrical parameters of the amplifier to produce it and reduce the criticality to the frequency-shaping elements, the first, second and third transistors are additionally connected in the amplifier between the input and intermediate frequency stages; of which the first type npn is connected by a base to the collector of the input stage transistor, the collector base of the second and third transistor of the pnp type and via the emitter resistor of the second transistor and to the collector of the transistor the intermediate stage interrupt, and the emitter on the series-parallel coupling resistor and the collector of the second transistor and the transistor base transistor base with the collector of the third transistor, are connected to the minus terminal of the coupler, and its emitter and base of the output emitter dynamic emitter transistor - to the bias source. 2. An integral reproduction amplifier for stereo cassettes according to claim 1, wherein the resistance in the base circuit of the input stage transistor is performed in a base p-layer with a reduced cross-section using an emitter layer. Recognized by the invention on the basis of the results of expertise, conducted by the State Committee for Inventions and Discoveries of the USSR, Moscow, SU 1 drawing