Data Acquisition and Signal Processing for Smart Sensors

LIST OF ABBREVIATIONS AND SYMBOLS

δq	program-specified relative quantization error
Δq	absolute quantization error
Df	specified measuring range of frequencies
fx	measurand frequency
f0	reference frequency
F	greater of the two frequencies fx and f0
f	lower of the two frequencies fx and f0
fbound	lower frequency limit
Fbound	upper frequency limit
m	counter capacity
Nδ	number, determined by the error δ = 1/Nδ
Nx	number of periods of lower frequency f
T	period of greater frequency (T = 1/F)
τ	period of lower frequency (τ = 1/f)
Tq	quantization window
T0	reference gate time interval
ABS	antilock braking system
ADC	analog-to-digital converter
ALU	arithmetic logic unit
ASIC	application specific integrated circuit
ASIP	application specific instruction processor
CAD	computer-aided design
CMOS	complementary metal oxide semiconductor
CT	counter
DAC	digital-to-analog converter
DAQ	data acquisition
DFT	discrete Fourier transformation
DSP	digital signal processor
FCC	frequency-to-code converter
FPGA	field-programmable gate array
FS	full scale
GUI	graphical user interface
LCF	Liapunov characteristic function
MDC	method of dependent count
μK	microcontroller
μP	microprocessor
MSM	multichip module
PCA	programable counter array
PCM	program-oriented conversion method
PWM	pulse width modulation
RAM	random access memory
ROM	read-only memory
VFC	voltage-to-frequency converter
VLSI	very large scale integration