protel封装形式很详细Protel99元件封装列表原理图常用元器件都在protelDOSschematicLibraries.ddb里此外还有protelDOSschematic4000CMOS(4000序列元件)protelDOSschematicAnalogdigital(A/D,D/A转换元件)protelDOSschematicComparator(比较器,如LM139之类)protelDOSschematicintel(Intel的处理器和接口芯片之类)protelDOSschematicLinear(一些线性器件如555等)protelDOSschemat