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实现模拟乘法中的高绝对精度总 是一个令人们感兴趣的问题。激 光校准的AD734B四象限乘法器可提供高精度,而且对被乘数的范围没有严格的限制,其精度不用调谐可达0.25％满度;使用简单的外部微调则优于0.05％满度,同时对10MHz提供匀称的响应。 精度需要优于AD734 B技术条件中所保证的精度的场合,只需增加少量的外部器件(图1)。使用与混合解决方案支持的相同输入电压范围,以及Ula和Ulb连接,其最坏情况的绝对误差可始终如一地达到0.025％。然而就像使同混合解决方案一样,检验这些高标准
Achieving high absolute accuracy in analog multiplication is always a matter of interest. The laser-calibrated AD734B four-quadrant multiplier provides high accuracy with no strict limits on the multiplicand range without tuning accuracy up to 0.25% full scale; simple to use external trim is better than 0.05% full scale while Provide symmetrical response to 10MHz. Where accuracy needs to exceed accuracy guaranteed in the AD734 B specification, only a few additional external components are required (Figure 1). With the same input voltage range supported by hybrid solutions, as well as Ula and Ulb connections, the worst case absolute error can consistently be 0.025%. However, it is like testing these high standards like a hybrid solution