Title :
Dual Tone and MODEM Frequency Generator with On-Chip Filter and Voltage Reference
Author :
Oswald, W. ; Fasser, J. ; Hirsch, G. ; Mulder, J.
Author_Institution :
FASELEC AG Zurich, Switzerland
Abstract :
This CMOS circuit contains a Dual-Tone-Multi-Frequency (DTMF) and MODEM frequency generator. For optimum performance and economy, switched capacitor techniques are used for on-chip voltage reference, DA-Converter and filter.
Keywords :
CMOS technology; Costs; Digital filters; Filtering; Frequency; Modems; Reproducibility of results; Switching circuits; Telecommunication switching; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1983. ESSCIRC '83. Ninth European
Conference_Location :
Lausanne, Switzerland
Print_ISBN :
2-88074-021-5
