Title :
Current sensor on the base of permanent pre-chargeable amplifier
Author :
Varshavsky, Victor ; Tsukisaka, Masayuki
Author_Institution :
Comput. Logical Design Lab., Aizu Univ., Fukushima, Japan
Abstract :
The sensitivity and delay of the amplifier are the key problems in the performance of current sensors (CS). For large devices which consist of several cells, for example 32 bit, the amplifier must react to 10-20 mV. The previous type of highly sensitive amplifier which is based on cascade and reference voltage [dill] can react to this level of voltage. But this model is not stable in respect to technological and parametric variation. In this paper we suggest triple cascade inverters with feedback by an unsymmetrical pass transistor which amplifies 1 mV without reference voltage. Monte Carlo SPICE simulation shows the stability of this model for parametric variation. We prepare the schematic of CS which includes a control unit with shunt transistors and evaluate the delay
Keywords :
CMOS logic circuits; Monte Carlo methods; SPICE; asynchronous circuits; circuit simulation; electric current measurement; integrated circuit measurement; logic gates; logic simulation; transients; 10 to 20 mV; 32 bit; Monte Carlo SPICE simulation; current sensors; parametric variation; permanent pre-chargeable amplifier; shunt transistors; triple cascade inverters; unsymmetrical pass transistor; CMOS logic circuits; Capacitance; Content addressable storage; Delay; Immune system; Inverters; Logic devices; Pulse amplifiers; Semiconductor device modeling; Threshold voltage;
Conference_Titel :
VLSI, 1999. Proceedings. Ninth Great Lakes Symposium on
Conference_Location :
Ypsilanti, MI
Print_ISBN :
0-7695-0104-4
DOI :
10.1109/GLSV.1999.757412
