NTE1728

NTE1728 Integrated Circuit VIF & SIF Circuit for VCR Description: The NTE1728 is an integrated circuit in a 30–Lead DIP type package containing the VIF section and SIF on a single chip. Since this device is capable of performing video detection and sound detection independently or simultaneously, it can be applied to various sets from popular type to high–grade type according to the designer’s policy. Features: D High–Gain VIF Amp Requiring No Preamp D High AGC Speed D Provides Wide–Band Detection Characteristics and Meets Sound MPX Demodulation Requirements because of FM Detection being Quadrature Detection. D Possible to use Sound REC Pin (Pin2), AUX Pin (Pin3) D Possible to Mute Video, Sound for VCR D Pin7 GND: Muting of both Video and Sound D Pin29 GND: Muting of Sound Only Functions: D VIF Section: VIF Amp Video Det, Peak IF AGC, B/W Noise–Canceller, RF AGC, AFT, SIF DET D SIF Section: SIF Limiter Amp, FM Det, DC ATT, AF Driver Operating Characteristics: (TA = +25°C, VCC = 12V, fp = 58.75MHz, fs = 54.25MHz (VIF), fo = 4.5MHz (SIF) unless otherwise specified) Parameter VIH Section Total Circuit Current Maximum RF AGC Voltage Minimum RF AGC Voltage Quiescent Video Output Voltage Quiescent AFT Output Input Sensitivity AGC Range I23 + I24 DC VH13H V13L V22 V17 Vi GR DC DC DC DC fm = 400Hz 40% AM, VO = 0.8Vpp fm = 15kHz 78% AM, VO = ±1dB 59 8.5 – 5.6 4.5 30 60 74 8.9 0 6.1 6.5 36 74 98 9.2 0.5 6.6 7.5 42 – mA V V V V dBµ dB Symbol Test Conditions Min Typ Max Unit Operating C...