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Silicore VIDEO AND SOUND IF AMPLIFIER FOR COLOR AND MONOCHROME TV RECEIVERS CHMC FUNCTION P I F S TA G E Three Controlled IF Amplifier stages Vi d e o D e m o d u l a t o r C o n t r o l l e d b y P i c t u r e Carrier Black Noise and White Noise Inverter Peak AGC DC Amplifier for RF AGC Output D7678 S I F S TA G E Three Controlled IF Amplifier Stages Quadrature Detector Outline Drawing F E AT U R E P I F S TA G E H i g h G a i n , Wi d e B a n d I F A m p l i f i e r : 5 0 d B ( Ty p . ) a t 5 8 M H z G a i n R e d u c t i o n w i t h E x c e l l e n t St a b i l i t y : 5 5 d B ( Ty p . ) a t 5 8 M H z E x c e l l e n t D G / D P C h a r a c t e r i s t i c s : D G 7 % ( Ty p . ) , D P 3 . 5 d e g . ( Ty p . ) Excellent S/N Characteristics Due to Delayed 3 Stage AGC Action. Fast AGC Action Due to Noise Inverter and Peak AGC. S w i t c h O f f t h e Vi d e o p a r t w i t h V T R S w i t c h . Dual Differential AFT Output. S I F S TA G E Excellent Limiter Characteristics. Excellent AM Rejection. L a rg e U n d i s t o r t e d A u d i o O u t p u t Vo l t a g e w i t h Q u a d r a t u r e D e t e c t o r. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 1/13 CHMC Silicore PIN CONNECTION D7678 IF IN 1 FIL 2 RFAGC CON 3 RFAGC OUT 4 SIF IN 5 SIF TA 6 OUT AF 7 IF TA 8 9 IF TA 10 SIF TA 11 Vcc 12 VF OUT 13 GND 14 AGC FIL 15 FIL 16 IF IN BLOCK DIAGRAM 11 5 6 BIAS CIRCUIT LIMITER 15 16 1 2 1nd IF 2nd IF 3nd IF LIMITER SOUND DET 7 10 9 VIDEO AMP 8 4 AGC3 AGC2 AGC1 NOISE INVERTER 12 13 3 14 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 2/13 CHMC Silicore M A X I M U M R AT I N G S ( Ta = 2 5 ae CHARACTERISTIC S u p p l y Vo l t a g e O p e n L o o p Vo l t a g e Vi d e o D C O u t p u t C u r r e n t Power Dissipation A m b i e n t Te m p e r a t u r e St o r a g e Te m p e r a t u r e ( P i n 11 ) (Pin 4) (Pin 12) (note) D7678 ) SYMBOL Vcc V4 I1 2 PD Ta Ts t g R AT I N G 15 15 6 1.4 -20~65 ae ae -55~150 UNIT V V mA W E L E C T R I C A L C H A R A C T E RI S T I C S PI F S TA G E ( Ta = 2 5 ae , Vc c = 1 2 V,f p = 5 8 . 7 5 M H z, f s = 5 4 . 2 5 M H z) SYMBOL Vcc ( V 11 ) Icc ( I 11 ) V12 V5 V7 V4 S AT I4 LEAK Vi Pin1-16 | A (IF) VSYNC (V12) VIN MAX PIF Vw TH (V12) Vw CL (V12) VB TH (V12) TEST CIRCUIT 1 1 1 1 1 1 2 2 2 2 2 2 2 TEST CONDITION S1:ON, S3:2, S5:2, S4:1 S 1 : O F F, S 3 : 2 , S5:2, S4:1 S1:ON, S3:2, S5:2, S4:1 S1:ON, S3:2, S5:2, S4:1 S 1 : O F F, S 3 : 2 , S5:2, S4:1 S 1 : O F F, S 3 : 2 , S5:2, S4:1 (Note 1) (Note 2) (Note 3) (Note 4) (Note 5) (Note 5) (Note5) CHARACTERISTIC Recommended S u p p l y Vo l t a g e Supply Current VIDEO DC Output Vo l t a g e Te r m i n a l Vo l t a g e 5 Te r m i n a l Vo l t a g e 7 RF AGC Residual O u t p u t Vo l t a g e RF AGC Leak Current Vi d e o S e n s i t i v i t y AGC Range S y n c Ti p L e v e l Vo l t a g e Maximum IF Input Vo l t a g e White Noise Threshold White Noise Clamp Level Lack Noise Threshold MIN. 10.8 35 5.2 3.5 4.8 60 60 2.3 100 5.8 3.7 1.4 T Y P. M A X . 12.0 50 5.5 4.4 6.0 150 64 2.5 120 6.2 4.1 1.6 13.2 65 5.8 5.3 7.2 0.5 1 UNIT V mA V V V V |I A Vr m s dB V m Vr m s V V V 3/13 2 5 0 |I 2.7 6.6 4.5 1.8 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn CHMC Silicore E L E C T R I C A L C H A R A C T E RI S T I C S PI F S TA G E ( Ta = 2 5 ae CHARACTERISTIC Black Noise Clamp Level Vi d e o F r e q u e n c y Response Suppression of carrier Suppression of 2nd carrier Suppression of Sound Carrier/Color Sub-carrier Differential Phase Differential Gain PIF Input Impedance M a x . Av a i l a b l e C u r r e n t RF AGC Delay Point Range Vi d e o O u t p u t L e v e l S I F O u t p u t Vo l t a g e D7678 CONTINUE , Vc c = 1 2 V,f p = 5 8 . 7 5 M H z, f s = 5 4 . 2 5 M H z) SYMTEST BOL CIRCUIT VB CL 2 (V12) fBW CL I2nd I920 DP DG RIN(PIF) CIN(PIF) I4 MAX VIN D E L AY VOUT SOUT 3 4 4 4 5 5 6 1 2 2 3 TEST M I N . T Y P. M A X . U N I T CONDITION (Note 5) (Note 6) (Note 7) (Note 8) (Note 9) (Note 10) (Note 10) ( N o t e 11 ) (Note 12) (Note 13) (Note 14) (Note 15) 2.9 4.5 40 40 33 1.5 7.0 5.0 2.25 200 3.3 5.5 50 50 38 3.5 7 3.0 3.0 7.0 2.5 400 3.7 5 10 6.0 10.0 9.0 2.75 600 V MHz dB dB dB deg % k | pF mA V V m Vr m s S I F S TA G E CHARACTERISTIC I n p u t L i m i t i n g Vo l t a g e AM Rejection Ratio Recovered Output Vo l t a g e To t a l H a r m o n i c Distortion Max. Audio Output Vo l t a g e SIF Input Impedance Audio Output Impedance TEST SYMTEST M I N . T Y P. M A X . U N I T BOL CIRCUIT CONDITION VIN(LIM) 8 (Note 16) 200 4 0 0 |I Vr m s (Note 17) AMR 8 40 45 dB R D = R L = (Note 18) 8 0.5 0.75 Vr m s VOD R D = R L = (Note 18) 1.0 2.0 % THD 8 R D = R L = VOM RIN CIN (SIF) (SIF) 8 7 9 (Note 19) 4.0 10.0 - 20.0 3.0 15.0 30.0 10.0 20.0 Vp-p k | pF k | RO(AF) (Note 20) 10.0 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 4/13 CHMC Silicore NO T E : 1 . V A G C ( T P 1 4 E X T. A p p l y i n g Vo l t a g e ) = 11 . 5 V PIF IN; f=58.75MHz 1kHz 30% AM modulation D7678 A d j u s t P I F I n p u t L e v e l Vi s o t h a t t h e d e t e c t e d o u t p u t o f T P 1 2 C w i t h h i g h impedance probe will be 0.8Vp-p and measure the Input Level. 2. VAGC=4V M e a s u r e P I F I n p u t L e v e l Vi ' s a m e a s N O T E 1 A = 2 0 l o g Vi ' / Vi ( d B ) 3 . P I F I N ; f = 5 8 . 7 5 M H z C W 1 5 m Vr m s Measure DC Level of TP12A 4. PIF IN; f=58.75MHz APL 100%, 87.5% AM modulation. TP14: open (1) Adjust PIF Input Level 50mVp-p and measure the detected output level V01p-p (2) Then increase the Input Level so that detected output level will be 1.1xV01p-p and measure the Input Level 5. VAGC=8V P I F I N ; f = 5 8 . 7 5 M H z 1 0 M H z Va r i a b l e o r S w e e p 1 5 m Vr m s M e a s u r e D C l e v e l o f TP12A. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 5/13 CHMC Silicore 6. VAGC=8V (GR30dB) SG1 ; 58.75MHz CW S G 2 ; 5 8 . 6 5 ~ 4 0 M H z Va r i a b l e (1) Setting output of SG1 so that DC level of TP12A will be 4.0V D7678 (2) Setting output of SG2(58.65MHz) so that AC level of TP12A will be 0.5Vp-p (3) Decreasing Frequency of SG2 until AC level of TP12A will be 0.35Vp-p (-3dB of 0.5Vp-p) then read fSG2=F fBW=58.75-F MHz 7 . S G 1 ; 5 8 . 7 5 M H z , 1 k H z 8 0 % A M m o d u l a t i o n 1 0 0 m Vr e m s SG2, SG3 ; OFF Setting VAGC so that output AC level of TP12A will be 2.7Vp-p Measure CL of TP12A after setting to 0% AM of SG1 8. Measure I2nd of TP12A same as NOTE 9 9. VAGC=8V S G 1 ; 5 8 . 7 5 M H z ( P ; P i c t u r e ) 1 0 0 m Vr m s S G 2 ; 5 4 . 2 5 M H z ( S ; S o u n d ) 3 2 m Vr m s ( - 1 0 d B o f S G 1 ) S G 3 ; 5 5 . 1 7 M H z ( c ; c h r o m a ) 3 2 m Vr m s ( - 1 0 d B o f S G 1 ) (1) Setting VAGC so that the output tip level (lower) of TP12A will be 3.0V DC (2) Measure the level difference (dB) between c-level and 920kHz level 10. VAGC=8V P I F I N ; f = 5 8 . 7 5 M H z Vi d e o S i g n a l ( r a m p ) 8 7 . 5 % A M 1 0 0 m V p - p S e t t i n g AT T s o t h a t t h e s y n c t i p l e v e l o f T P 1 2 A w i l l b e 2 . 5 V D C Measure DP and DG 1 1 . V A G C = 5 V, f = 5 8 . 7 5 M H z Measure RJN ,CIN 12. S1: ON, S3: 2, S5: 1, S4: 1 13. TP14: Open P I F I N ; 5 8 . 7 5 M H z C W 2 0 m Vr m s (1) Adjust the voltage of terminal 3 so that the voltage of terminal 4 will be 6.0V DC (2) Measure the terminal voltage 3 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 6/13 CHMC Silicore 14. TP14: Open D7678 PIF IN ; 58.75MHz 100% APL 87.5% AM modulation Signal Amplitude 50Vp-p M e a s u r e d e t e c t e d o u t p u t v o l t a g e ( W h i t e p e a k t o s y n c Ti p ) 15. TP14: Open S G 1 ; 5 8 . 7 5 M H z C W 1 0 0 m Vr m s S G 2 ; 5 4 . 2 5 M H z C W 2 5 m Vr m s Measure SIF (4.5MHz) output voltage at TP12A 16. SIF IN ; f=4.5MHz FM fMOD=400Hz f=25kHz (1) Adjust SIF Input Level 100mVp-p and measure the detected output level Vo s (2) Then decrease the Input Level so that the detected output level will be 3dB down of VOD and measure the Input Level 17. SIF IN ; f=4.5MHz FM : fMOD=400Hz f=25kHz FM : fMOD=400Hz f=25kHz AM 30% Input Level VINS=100dB 18. SIF IN ; f=4.5MHz Input Level VINS=80dB 1 9 . S I F I N ; f = 4 . 4 ~ 4 . 6 M H z Va r i a b l e o r S w e e p Measure the output DC voltage change 20. SIF IN; f=4.5MHz FM : fMOD=400Hz f=25kHz Input Level VINS=80dB ( 1 ) M e a s u r e t h e d e t e c t e d o u t p u t v o l t a g e V O I w i t h R X = (2) Then , adjust RX so that the detected output voltage will be VOI/2 and measure RX. SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 7/13 CHMC Silicore TEST CIRCUIT 1.DC TEST CIRCUIT D7678 5.1K 3.3K 1 SW4 820K 2 3.9K 1.6K A 47uF 12V 16 15 14 13 12 11 10 9 SW1 1 2 3 4 5 6 7 1000pF 8 C=0.01uF A 2 SW5 1 1.6K 100 2 1 SW3 15V or 12V SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 8/13 CHMC Silicore 2.AC TEST CIRCUIT D7678 _+ Vcc=12.0V 0.01uF C15 C16 47uF D01 LED R15 1.5K TRF 6002 TRF1027 VIDEO 10 9 4 100pF RD 3 SIF SW C14 0.22uF TP14 0.01uF C05 VIDEO OUTPUT TP12A 100K TP12C R12 1.6K 0.01uF 12 R11 820K 16 15 14 13 0.001uF C04 3.9K 75pF 6 1 2 3 4 5 0.01uF 1K 6 7 8 C12 11 1 0.01uF 50 TP15 AGC 1.6K 0.1uF R9 1K 5K R1S1 VR AGC 51 0.01uF PIF INPUT 1000pF SIF INPUT AF OUT SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 9/13 CHMC Silicore CIRCUIT D7678 3 . VIDEO FREQUENCY RESPONSE & SIF OUTPUT VOLTAGE TEST SG1 50 Pad SG2 Fig. PIF IN CIRCUIT TP12A MON. SCOPE 4 . I N T E R M O D U L ATI O N T E S T CI R C UI T SG1 58.75MHz SG2 54.25MHz SG3 55.17MHz 25 25 25 25 ATT PIF IN Fig.4 CIRCUIT TP12A MON.SCOPE SPECTRUM ANALYZER 5.DC,DP TEST CIRCUIT DG DP MEASURING EQUIPMENT SINGAL OUT SIGNAL IN TP12A SG & MODULATOR fo=58.75MHz ATT PIF IN Fig.4 CIRCUIT VIDEO OUT MON.SCOPE APL=50% ATT:ADJUST SYNC TIP LEVEL to DC2.5V SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 10/13 CHMC Silicore 6.PIF INPUT IMPEDANCE TEST CIRCUIT VAGC=5V Vcc=12V D7678 Hi R-X METER f=58.5MHz 16 15 14 13 12 11 10 9 1 Lo 2 3 4 5 6 7 8 C: 0.01uF 7.SIF INPUT IMPEDANCE TEST CIRCUIT VAGC=5V Vcc=12V 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 Hi R-X METER f=4.5MHz Lo C: 0.01uF SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 11/13 CHMC Silicore 8 . V I N ( L I M ) , AM R , VO D , TH D , V O M T E S T CI R C U I T D7678 SIF INPUT FM AM SG ATT 0.01uF Fig.4 CIRCUIT AF OUT V.V RL DISTOR TION METER 9.AUDIO OUTPUT IMPEDANCE TEST CIRCUIT SIF INPUT FM Fig.4 CIRCUIT AF OUT V.V Rx SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 12/13 CHMC Silicore A P P L I C ATI O N C I R C U I T AUDIO D7678 Vcc=12V TRF6002 100pF TRF1027 58.75MHz TANK SW OUT 1K 24pF 24pF 1000pF 4.5MHz TANK 75pF 1.0uF 0.01uF 3.9K 9 8 6 7 0.01uF 47uF 2.4K 11 10 VIDEO OUT 1K 16 15 14 13 12 5 0.22uF 4 4.5MHz FILTER 0.01uF 220 1K RF AGC OUTPUT 820K 0.01uF 1000pF 820 TRF1029 F10213 1K 10K VR 2.2uF 0.01uF 330 0.01uF TRF9223 Q25uH Q33uH TRF9224 FROM TINER RF OUTPUT 0.01uF 100K 390 5.6K 2SC388A 33 1.5K 1 2 3 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 13/13 CHMC |
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