Abstract
This paper reports on a telephone chip that performs all the basic functions of a speech circuit using only two external components. Precision filtering using Switched Capacitor (SC) techniques is used to implement on-chip impedance termination, hybrid with sidetone cancellation and DC characteristics starting from a single 1% external resistor. Better than 30 dB matching is achieved without any external trimming. The TX linearity is better than 50 dB up to 4.4 Vpp on the line. The chip has an active area of approximately 4,000 mils2 and draws 1.5 mA from the supply.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
