System radio am / fm
such an integrated combines most of the circuits needed for a complete system receiving radio am / fm. internal blocks that contained in the system include a power amplifier, a converter am (mixer and local oscillator), the stage of fi am, the detector stage fi fm and fm detector. necessary external components such as resistors, inductors and resistors to make fully functional receiver. these external components identifies some of the functional characteristics of the system, such as the bandwidth and gain. further external components needed to build the tank circuits necessary for the tuning stages of fi. functions can also be included in the integrated power supply is regulated, the output meter and audio mute.
reception system am
as shown in the figure below (fig. 5), all active components of a typical AM receiver are integrated into a single CI. only resonance networks must be available abroad. This integrated circuit includes the RF converter, IF amplifier, the detector circuit and automatic gain control (AGC), the integrated zener diode controller and audio preamp stage. in some integrated reception systems am also including rf amplifier, excluding the tuning meter or audio preamplifier.
Appliance Timer control
timers control but differ in their flexibility of application, the timer is typical, as the integrated circuit shown in following figure (Fig. 6), can be used with both 50 lines of 60 hz working both on an hourly basis of twelve and twenty-four hours. if using a power line, you must have an external clock input. external control terminals are used to initialize the minutes and hours and start or stop the timer. There is also a control \u0026lt;\u0026lt;inicialización>>, which caused the return timer to original time, a control \u0026lt;\u0026lt;repetición>>, which allows the timer to repeat this as many times as this control is activated, and control \u0026lt;\u0026lt;cancelación>>, To cancel the alarm.
processor dolby noise recuccion
this chip has been designed specifically to carry out noise reduction according to standard Dolby-B to single-channel audio. plus an internal power regulator. contains a set of amplifiers and needs some external RC networks. one of these networks, which includes five capacitors and three resistors, connected to four external terminals, while the second, which is the pathway feedback is formed by three resistors and three convictions working with internal rectifier circuit. These RC networks are carefully specified by the manufacturer to ensure the collection of noise reduction system dolby-b desired.
five function calculator
this integrated circuit has just the four basic functions of calculus, as well as the charge and discharge rates. works with a simple keyboard consisting of keys c-ce, the ten numeric keys and six function keys but the decimal point. is the typical pocket calculators economic and contains all the logic and memory functions in a single integrated 28 terminals. in many advanced calculators used by many other more complex integrated circuits that provide more than eight-digit display, but the five basic functions and some limited amount of memory, but its basic features are the same.
as shown in the figure below, the nine digits connections are shared between the keyboard and display. three lines from the keyboard indicate the integrated column of keys has been pressed. combining this information with that digit. when you press a key on the keyboard, the same set of nine lines validates one of the eight-digit display, lighting l corresponding seven-segment digit. the other entries are the external oscillator and the oscillator signal validation.
Luis Fernando Cantor Well
19135529
Electronic Engineering, Solid state electronics
Section 2
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