A BiCMOS Speech Circuit with only Two External Components
作者： R. Castello , L. Tomasini
DOI: 10.1109/ESSCIRC.1992.5468142
关键词:
摘要: This paper reports on a telephone chip that performs all the basic functions of speech circuit using only two external components. Precision filtering Switched Capacitor (SC) techniques is used to implement on-chip impedance termination, hybrid with sidetone cancellation and DC characteristics starting from single 1% resistor. Better than 30 dB matching achieved without any trimming. The TX linearity better 50 up 4.4 Vpp line. has an active area approximately 4,000 mils2 draws 1.5 mA supply.
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