TB1231N是东芝公司近年来推出的I~2C总线控制彩电单片集成电路,56个引出脚,外形为双排直插式塑封结构,由于采用MOS电路与双极型电路相结合技术,把色带通滤波器、色度陷波器、亮度延时线、伴音鉴频器甚至庞大的梳状滤波器(1H基带延时线)都集成于其中。在多制式系统中色副载波压控振荡器只需一 TB1231N Toshiba Corporation in recent years introduced I ~ 2C bus-controlled color TV monolithic integrated circuits, 56 pins, the shape of double-line in-line plastic packaging structure, the use of MOS circuits and bipolar circuit technology, the ribbon Pass filter, chrominance notch filter, brightness delay line, audio frequency discriminator and even a huge comb filter (1H baseband delay line) are integrated. In the multi-standard system color subcarrier voltage-controlled oscillator just one