|
|
|
|
|
S/S:
Single Supply.
|
|
Samples per Second:
In data conversion, an
analogue signal is converted to a
stream of numbers, each representing the analog signal's
amplitude at a moment in time. Each number is called a
"sample." The number sample per second is called the
sampling rate, measured in samples per second.
|
|
Sampling Rate:
An
ADC converts an
analog signal into a stream of
digital numbers, each representing the analog signal's
amplitude at a moment in time. Each number is called a
"sample". The number sample per second is called the
sampling rate, measured in samples per second.
|
|
SAR:
Successive Approximation Register: Used to perform the
analog-to-digital conversion in successive steps in many
analog-to-digital (ADC) converters.
|
|
Scan Design:
A design technique in which the internal registers or
flip-flops of a circuit can be chained, to allow an external
circuit to easily read and write their contents.
|
|
SCF:
Switched-Capacitor Filter.
|
|
SCT:
Single Chip Transceivers. A single IC that includes data
communication transmitter and receiver functions.
|
|
SD:
Signal Detect.
|
|
SDA:
Serial Data Access.
|
|
Semiconductor:
A substance that can act as an electrical conductor or
insulator depending on chemical alterations or external
conditions. Examples are silicon, germanium, and gallium
arsenide.
|
|
Sense Resistor:
A resistor placed in a current path to allow the current to
be measured. The voltage across the sense resistor is
proportional to the current that is being measured and an
amplifier produces a voltage or current that drives the
measurement.
|
|
Serial Interface:
A serial interface (as distinguished from a parallel
interface) is one in which data is sent in a single stream
of bits, usually on a single wire-plus-ground.
|
|
SMD:
Surface Mount Device. An electronic component that
mounts on the surface of a printed circuit board (as opposed
to "through-hole" components which have pins that are
inserted into holes). SMDs typically allow more components
per square centimeter of
PCB, but their scale is such
that hand assembly and prototyping may be difficult.
|
|
Snubber:
A device which suppresses voltage transients.
|
|
SOT:
Small Outline
Transistor.
|
|
Squelch:
A circuit which mutes the signal when it is below a certain
level. Typically used to quiet the signal when only noise is
present.
|
|
SRF:
Self-Resonant Frequency.
|
|
SS:
Soft-Start; Sample Size.
|
|
SSC:
Smart Signal Conditioning.
|
|
SSOP:
Shrink Small-Outline Package.
|
|
Star Ground:
A
PCB layout technique in which all components connect to
ground at a single point. The traces make in a "star"
pattern, emanating from the central ground.
|
|
Star Point:
A point from which all traces leave in a "star" pattern in
PCB layout.
|
|
STC:
Silicon Timed Circuit. A circuit that produces a delayed
version of the input signal. Also known as a delay line.
|
|
Step-Up:
A switch-mode
voltage regulator in which output voltage is
higher than its input voltage.
|
|
Strobe:
A pulse used for timing and synchronization.
|
|
Switched Capacitor Circuit:
A circuit methodology, typically implemented in
CMOS
integrated circuits, that uses clocked switches and
capacitors to transfer charge from node to node such that a
resistor function is realized. The effective resistance is
governed by capacitor size and switching clock frequency.
|
|
Switching Regulator:
A
voltage regulator that uses a switching element to
transform the supply into an alternating current, which is
then converted to a different voltage using capacitors,
inductors, and other elements, then converted back to
DC.
The circuit includes regulation and filtering components to
insure a steady output. Advantages include the ability to
generate voltages beyond the input supply range and
efficiency; disadvantages include complexity.
|
|
|
|
|