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Input filter circuit for a dual band gsm / dcs cellular phone
Input filter circuit for a dual band gsm / dcs cellular phone
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机译:双频段gsm / dcs蜂窝电话的输入滤波器电路
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摘要
A front end circuit for an RF dual band GSM/DCS phone includes a first channel including an elliptical high-pass filter, a first SAW filter, and a low noise amplifier and a second channel including a second SAW filter and a second low noise amplifier. The output of each channel is alternately switchable to a single-side band mixer circuit. This front end circuit arrangement provides significantly reduced cost and part count over other approaches.
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