Title :
A 1.4 V switched capacitor filter
Author :
Adachi, Toshio ; Ishikawa, Akira ; Barlow, Allen ; Takasuka, Kaoru
Author_Institution :
Asahi Kasei Microsyst., Tokyo, Japan
Abstract :
An approach to creating switched-capacitor circuits with supply voltages as low as 1.4 V is presented. The addition of one mask step creates an addition device type of low threshold. This device may be used both as a switch and in the amplifiers of switched capacitor circuits. A seventh order Chebyshev test circuit demonstrated performance approximating that of the more 5-10 V switched-capacitors filter circuits. By adding a second threshold adjustment implant mask for p-channel devices additional voltage reduction and performance improvement may be achievable
Keywords :
active filters; masks; monolithic integrated circuits; switched capacitor filters; 1.4 V; addition device type; mask step; p-channel devices; seventh order Chebyshev test circuit; supply voltages; switched capacitor filter; threshold; threshold adjustment implant mask; voltage reduction; Capacitors; Circuit simulation; Clocks; Filters; Frequency; Immune system; Switches; Switching circuits; Transfer functions; Voltage;
Conference_Titel :
Custom Integrated Circuits Conference, 1990., Proceedings of the IEEE 1990
Conference_Location :
Boston, MA
DOI :
10.1109/CICC.1990.124687
