Information is captured in an electric signal through variations in voltage or current that correspond to specific data. These variations can represent binary values (0s and 1s) in digital systems or varying amplitudes and frequencies in analog systems. For instance, in digital communication, a high voltage might represent a '1' and a low voltage a '0'. This encoding allows the transmission and processing of complex information over electrical circuits.
They are a method of storing information, but as there is no computer or digitizing element involved, it is not exactly a digital signal. It is an analog signal.
If no modulation signal is applied to an amplitude modulated (AM) signal, the output will effectively be a constant carrier wave at the carrier frequency. This means that the amplitude of the signal will remain constant, without any variation or modulation corresponding to an information signal. As a result, the AM signal will not convey any information and will simply be a pure tone at the carrier frequency.
Transducer
With full double sideband AM the bandwidth of the modulated signal is twice that of the baseband information signal. With suppressed carrier single sideband AM the bandwidth of the modulated signal is identical to that of the baseband information signal. With vestigial sideband AM the bandwidth of the modulated signal is somewhere between the above two cases, depending on how much of the vestigial sideband is included.
Yes, current can be considered a signal in certain contexts, particularly in electronics and telecommunications. It refers to the flow of electric charge, which can carry information through modulation techniques such as amplitude modulation (AM) or frequency modulation (FM). In these cases, variations in current can represent data, enabling communication and control in various systems.
Information is captured in an electronic signal with patterns in the controlled flow of electrons through a circuit.
Electronic signal.
Frequency
A changing electric current that carries information is called a signal. This signal can be in the form of varying voltage levels or frequencies that can represent data or enable communication between electronic devices.
Batteries
You could be getting a signal from a tracer wire.
Weak signal depending upon the type of signal.
voltmeters
Video cameras and tape first came out in 1951. They captured images from TV cameras by converting the information into electric impulses and saving it on tape.
An amplifier.
an amplifier.
Transformer