Download: Wideband class-A power amplifier for TV transposers in band I (50 − 80 MHz) with two transistors BLV33

APPLICATION NOTE Wideband class-A power amplifier for TV transposers in band I (50 − 80 MHz) with two transistors BLV33 NCO8207,

CONTENTS

1 SUMMARY 2 EXPECTED PERFORMANCE 3 PARTS LIST 1998 Mar 23 2, 1 SUMMARY The transistor BLV33 is primarily intended for use in linear VHF amplifiers for television transmitters and transposers. In report ECO7904 Mr. Zwanen describes the application of the BLV33 in a transposer amplifier for the TV band III (174 to 230 MHz). On customers request we have made a theoretical design of such a linear transposer amplifier for the TV band I (50 to 80 MHz). 2 EXPECTED PERFORMANCE Frequency range band I 50 to 80 MHz Gain 17.4 dB ± 0.3 dB Input VSWR ≤1.25 Output VSWR ≤1.25 Output power POsync at −60 dB int ≤30 W at −55 dB int ≤45 W Cross modulation at POsync = 40 W ≤7.5% D.C. setting BLV33 IC = 3.2 A/VCE = 25 V Figure 1 shows the schematic line-up of the complete amplifier and Fig.2 gives the circuit of one BLV33 branch. The applied bias-unit has been described in report ECO7904. handbook, full pagewidth VB

BIAS CIRCUIT

Vb Vc BLV33 BRANCH R2 IN in 0° 90° iso 50 Ω H1 H2 iso 90° 0° in OUT 50 Ω R1 BLV33

BRANCH

Vb Vc

BIAS CIRCUIT

VB MGP955 H1 = H2 = hybrid coupler Anaren type 1A0230-3. R1 = R2 = 50 Ω resistor type Pyrofilm PPR 515-20-3. Fig.1 Schematic line-up of the amplifier. 1998 Mar 23 3, handbook, full pagewidth Vb Vc C19 C17 C20 C18 R1 C21 L11 L8 C10 C12 C14 C2 C4 C6 C8 L5L6 L7 L9 L10 C16 C1 L4L1 L2 L3 50 Ω 50 Ω BLV 33 C11 C13 C15 C3 C5 C7 C9 (25 V/3.2 A) MGP956 Fig.2 Circuit of a BLV33 branch. 1998 Mar 23 4, 3 PARTS LIST C1 = C16 = C17 = C19 2k7 chip capacitor Philips cat. no. 2222 852 13272 C2 = C14 39 pF chip capacitor ATC 100B C3 = C5 0 to 18 pF film dielectric trimmer Philips cat. no. 2222 809 05003 C4 110 pF chip capacitor ATC 100B C6 = C7 82 pF chip capacitor ATC 100B C8 = C9 300 pF chip capacitor ATC 100B C10 = C11 160 pF chip capacitor ATC 100B C12 150 pF chip capacitor ATC 100B C13 = C15 0.40 pF film dielectric trimmer Philips cat. no. 2222 809 07009 C18 = C20 330 nF polyester capacitor Philips cat. no. 2222 352 25334 C21 47 µF eleco Philips cat. no. 2222 030 37479 L1 103 nH 5 turns enamelled Cu-wire, ∅ 1 mm, int.diam. D = 5.5 mm length 7.6 mm, leads 2 × 5 mm L2 61.3 nH 5 turns enamelled Cu-wire, ∅ 1 mm, int.diam. D = 4.5 mm length 10.6 mm, leads 2 × 5 mm L3 27.1 nH 3 turns enamelled Cu-wire, ∅ 1 mm, int.diam. D = 4.4 mm, leads 2 × 5 mm L4 30.1 Ω stripline, width 6 mm, length l = 30 mm L5 30.1 Ω stripline, width W = 6 mm, length l = 5 mm L6 30.1 Ω stripline, width W = 6 mm, length l = 10.6 mm L7 60.2 Ω stripline, width W = 2 mm, length l = 35.5 mm L8 1 µH choke Philips cat. no. 4322 057 01081 L9 43.8 nH 4 turns enamelled Cu-wire, ∅ 1.5 mm, int.diam. D = 4.5 mm length 11.3 mm, leads 2 × 5 mm L10 87.5 nH 5 turns enamelled Cu-wire, ∅ 1.5 mm, int.diam. D = 6.5 mm length 15.1 mm, leads 2 × 5 mm L11 = L10 R1 10 Ω metal film resistor Printed-circuit board material is epoxy fibre-glass (εr ≈4.5), thickness 1/16”. 1998 Mar 23 5,

Philips Semiconductors – a worldwide company

Argentina: see South America Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +31 40 27 82785, Fax. +31 40 27 88399 Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND, Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213, Tel. +43 160 1010, Tel. +64 9 849 4160, Fax. +64 9 849 7811 Fax. +43 160 101 1210 Norway: Box 1, Manglerud 0612, OSLO, Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6, Tel. +47 22 74 8000, Fax. +47 22 74 8341 220050 MINSK, Tel. +375 172 200 733, Fax. +375 172 200 773 Philippines: Philips Semiconductors Philippines Inc., Belgium: see The Netherlands 106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI, Metro MANILA, Tel. +63 2 816 6380, Fax. +63 2 817 3474 Brazil: see South America Poland: Ul. Lukiska 10, PL 04-123 WARSZAWA, Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor, Tel. +48 22 612 2831, Fax. +48 22 612 2327 51 James Bourchier Blvd., 1407 SOFIA, Tel. +359 2 689 211, Fax. +359 2 689 102 Portugal: see Spain Canada: PHILIPS SEMICONDUCTORS/COMPONENTS, Romania: see Italy Tel. +1 800 234 7381 Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW, China/Hong Kong: 501 Hong Kong Industrial Technology Centre, Tel. +7 095 755 6918, Fax. +7 095 755 6919 72 Tat Chee Avenue, Kowloon Tong, HONG KONG, Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231, Tel. +852 2319 7888, Fax. +852 2319 7700 Tel. +65 350 2538, Fax. +65 251 6500 Colombia: see South America Slovakia: see Austria Czech Republic: see Austria Slovenia: see Italy Denmark: Prags Boulevard 80, PB 1919, DK-2300 COPENHAGEN S, South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale, Tel. +45 32 88 2636, Fax. +45 31 57 0044 2092 JOHANNESBURG, P.O. Box 7430 Johannesburg 2000, Finland: Sinikalliontie 3, FIN-02630 ESPOO, Tel. +27 11 470 5911, Fax. +27 11 470 5494 Tel. +358 9 615800, Fax. +358 9 61580920 South America: Al. Vicente Pinzon, 173, 6th floor, France: 51 Rue Carnot, BP317, 92156 SURESNES Cedex, 04547-130 SÃO PAULO, SP, Brazil, Tel. +33 1 40 99 6161, Fax. +33 1 40 99 6427 Tel. +55 11 821 2333, Fax. +55 11 821 2382 Germany: Hammerbrookstraße 69, D-20097 HAMBURG, Spain: Balmes 22, 08007 BARCELONA, Tel. +49 40 23 53 60, Fax. +49 40 23 536 300 Tel. +34 3 301 6312, Fax. +34 3 301 4107 Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS, Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM, Tel. +30 1 4894 339/239, Fax. +30 1 4814 240 Tel. +46 8 632 2000, Fax. +46 8 632 2745 Hungary: see Austria Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH, Tel. +41 1 488 2686, Fax. +41 1 488 3263 India: Philips INDIA Ltd, Band Box Building, 2nd floor, 254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025, Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, Tel. +91 22 493 8541, Fax. +91 22 493 0966 TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874 Indonesia: see Singapore Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Ireland: Newstead, Clonskeagh, DUBLIN 14, Tel. +66 2 745 4090, Fax. +66 2 398 0793 Tel. +353 1 7640 000, Fax. +353 1 7640 200 Turkey: Talatpasa Cad. No. 5, 80640 GÜLTEPE/ISTANBUL, Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053, Tel. +90 212 279 2770, Fax. +90 212 282 6707 TEL AVIV 61180, Tel. +972 3 645 0444, Fax. +972 3 649 1007 Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7, Italy: PHILIPS SEMICONDUCTORS, Piazza IV Novembre 3, 252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461 20124 MILANO, Tel. +39 2 6752 2531, Fax. +39 2 6752 2557 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 Tel. +81 3 3740 5130, Fax. +81 3 3740 5077 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL, Tel. +1 800 234 7381 Tel. +82 2 709 1412, Fax. +82 2 709 1415 Uruguay: see South America Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR, Tel. +60 3 750 5214, Fax. +60 3 757 4880 Vietnam: see Singapore Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905, Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +9-5 800 234 7381 Tel. +381 11 625 344, Fax.+381 11 635 777 Middle East: see Italy For all other countries apply to: Philips Semiconductors, Internet: http://www.semiconductors.philips.com International Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 © Philips Electronics N.V. 1998 SCA57 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands Date of release: 1998 Mar 23]

15