The standard analog multiplier circuit (i.e. multiplying two analog signals to generate a product analog signal) sums the logs of the inputs then takes the antilog to form the output. The log and antilog functions are approximated using the base-emitter curve of transistors. The rest of the circuit is opamps, which have emitter coupled differential transistor amplifiers at their core. This however is limited to positive values only, and is called a one quadrant multiplier.
Perhaps you are asking instead about a type of analog multiplier using two cross-connected emitter coupled differential transistor amplifiers and several constant current sources for bias. The main advantages of these is they can correctly handle negative numbers, and are thus called four quadrant multipliers, and they are almost trivial to integrate compared to the opamp version.
the circuit which contain passive components such as (capacitor,inductor,resistance) and may also contain Active components like transistorsif there is a transistor in the circuitit is ANALOG circuit if it is used in the active modeit is DIGITAL circuit if it is used in the saturation and cutoff mode
Analogue
I thank that antalog time is the time on a analog clock, It makes since analog time on a analog clock.
An DAC convert digital signal to analog signal i.e Digital to Analog Converter. An ADC convert analog signal to digital signal i.e Analog to Digital Converter.
The left analog stick in the PC is the analog stick that is located to the left...
analog multiplier
amplification
Basically each and every amplifier circuit is made up of coupling or use of transistors. The amplifier amplifies the signals because transistor makes either voltage or current to rise as a result of either of it's regions of operation i.e. open circuit(cut off region) or short circuit (saturation region) Both the operation regions are not required continuously. Hecne the transistor works in either saturation or cut off regions only when emitter-base junction is forward biased, which can be applied as per requirement. APPLICATIONS OF TRANSISTOR AND HENCE AMPLIFIERS ARE : OSCILLATORS, LOUD-SPEAKERS, POWER AMPLIFIERS, VOLTAGE AMPLIFIERS, CURRENT AMPLIFIERS, ANALOG TO DIGITAL CONVERTER, DIGITAL TO ANALOG CONVERTERS
An op-amp is a DC coupled amplifier composed of two main stages:differential input stagehigh gain output stageBy use of appropriate feedback networks around the op-amp all the mathematical operations of an analog computer can be implemented. Because of its versatility op-amps have found wide usage in electronic fields unrelated to its original usage in analog computers.
See an analog design textbook for some specific examples but the gist of emitter follower's purpose in life is to transform a high output resistance signal source to achieve a signal with lower output resistance.
A camera chip is usually a CCD (Charge Coupled Device) which is the digital equivalent of film in an analog camera.
yes transistor is analog device because it can process the analog signal . But it can also used as digital devices as we know transistors are used for manufacturing logic gates and several digital devices as multiplexer and decoder encoder and memories also. it is the basic element of digital devices.
In analog ckt there is more distortion but in digital there is no distortion. Analog is a continues value digital is a discrite value(0 or 1). To measure analog is very difficult but in digital it is very easy. compare to analog the digital system is very compart for us. H.L.Kiran
Seeing as how they still had analog clocks in the original series, they literally had no idea of the digital world or the transistor for that matter.
The importance of the Transistor was that it could amplify an electrical signal. It was thus an analog of the vacuum tube devices, and could take advantage of the circuit history and applications that had built up over the preceding 50 years.
the circuit which contain passive components such as (capacitor,inductor,resistance) and may also contain Active components like transistorsif there is a transistor in the circuitit is ANALOG circuit if it is used in the active modeit is DIGITAL circuit if it is used in the saturation and cutoff mode
Transistors are made that work with 220 volt dc for power-switching. http://www.st.com/internet/analog/class/824.jsp