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一、方框图和典型外围电路HA11215A是一种单片式图象中频通道集成电路.国产金星、福日和进口CTP-236D、CRP-450D等彩色电视机中都采用这种集成电路,其内部功能图与典型外围电路(以金星电视机为例)见图1.HA11215A具有增益高、噪声低、性能稳和功能全等特点.配合声表面波滤波器SAWF(型号为HW2043),能构成完整的图象中频通道.它的中放增益为62分贝,比TA7607/TA7611AP约高出12分贝,可不用前置放大器,仍能
First, the block diagram and the typical peripheral circuit HA11215A is a monolithic image IF channel integrated circuit. Domestic Venus, Fu Japan and import CTP-236D, CRP-450D and other color television sets are used in this integrated circuit, and its internal functions Figure with a typical peripheral circuit (to Venus TV as an example) shown in Figure 1. HA11215A has a high gain, low noise, stable performance and functional congruent characteristics with surface acoustic wave filter SAWF (model HW2043), can form a complete Image IF channel.It’s put in the gain of 62 dB, TA7607 / TA7611AP higher than about 12 dB, without the preamplifier, can still