论文部分内容阅读
康佳T2986D1型大屏幕彩电采用的是三洋A6机芯,使用单片小信号处理集成电路LA7688(附图)。设计者将以前不能集成到芯片内的滤波器集成到了该芯片内,并广泛使用了PLL锁相环技术和开关电容技术。其主要特点是:1.彩电解码电路外围引脚、元件极少,放弃了典型“日本风格”的PAL-D彩色解码方式,取消了梳状滤波器,改用典型“欧洲风格”的PAL-S彩色解码方式,使整个彩色解码电路中没有可调元件;2.AFC电路不使用线圈移相,而采用内部锁相技术,减小了不稳定因素,提高
Konka T2986D1 large screen color TV using the Sanyo A6 movement, the use of single chip small signal processing integrated circuit LA7688 (with photos). Designers have integrated filters that were previously incapable of integration into the chip and made extensive use of PLLs and switched capacitor technology. The main features are: 1. Color TV decoding circuit peripheral pins, components rarely, to give up the typical “Japanese style” PAL-D color decoding, eliminating the comb filter, switch to the typical “European style” PAL- S color decoding, so that the entire color decoding circuit does not have adjustable components; 2.AFC circuit does not use the coil phase shift, and the use of internal phase-lock technology, reducing the instability, improve