What are the advantages and disadvantages of passive filters vs. active filters?
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In no particular order ..... \n\nAt low frequencies the necessarily high values of L and C can result in an inconveniently large size.  \n\nAn active filter, which can be designed to exhibit and work with higher impedance values means that smaller values of C can be used.\n\nAdditionally the use of a gyrator configuration can eliminate the need for L.\n\nA passive filter is inherently lossy, at least to some extent.\nAn active filter can have gain.\n\nAn active filter is usually smaller than a passive one.\n\nA passive filter doesn't require a power source.
874716
greater input for lesser ouput?\nmechanical advantage?\n\nyou would rather have a small input to produce a much greater output...\nthat's advantage...
1117310
In my experience, analog meters are much more useful in high electrical noise environments such as motor controllers and high voltage generation equipment.  The reason that analog meters are of more value in these applications is that they have a physical mass which needs to be moved in order to indicate.  As a result, inertia keeps transient, low energy pulses from affecting the overall indication.  Also, with any digital meter, you have a sample rate.  If there is any ripple or repetitive pulsing going on in the measured signal, you can get what is called aliasing, or false frequency indication which can fool the meter into reading a value other than what is truly there.
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I think you can...   the fact is that it's cheaper to do it with passive components and you will get a better response. I say because I had a project of radiocommunications and I tried an amplifier with an opamp which supposedly was for RF (the datasheet published a bandwidth of 1 GHz) for a band-pass centered a 220 MHz. The amplifier was not cheap but the response was very bad...  I ended with a RLC filter that did the job very good. That's my experience, and based in it I strongly recommend passive filters for RF applications.
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The repeater is just a box that has a built in bias tee to enable DC to pass up the RF cable to the active antenna. This gain overcomes long runs in Rf cable loss from the active antenna to the gps receiver, or the coupling loss of the distributed antenna
1055021
there is no disadvantage\nthere is advantage\ntwisted pair cabling is a common form of wiring in which two conductors are wound around each other for the purposes of canceling out electromagnetic interference which can cause crosstalk. The number of twists per meter makes up part of the specification for a given type of cable. The greater the number of twists, the more crosstalk is reduced. Twisting wires decreases interference
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A DSL filter is an analog low-pass filter installed on telephones and other analog devices to prevent interference between such devices and Digital Subscriber Line (DSL) service operating on the same line. Without the installation of DSL filters, high-frequency signals from analog devices can result in reduced performance and connection problems with DSL service, and the high-frequency signals from the DSL service can result in line noise and other issues for analog devices.\n\nTypical installation for an existing home involves installing DSL filters on every telephone and fax machine in the home, leaving the DSL modem as the only unfiltered device. In cases where it is possible to run new cables, it can be advantageous to split the telephone line after it enters the home, installing a single DSL filter on one leg and running it to every jack in the home where an analog device will be in use, and dedicating the other (unfiltered) leg to the DSL modem. Some devices, such as monitored alarms and Telephone Devices for the Deaf, cannot operate through DSL filters and must be installed on their own line. Some monitored alarms can be successfully filtered with a DSL filter or splitter.
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This might help\n\nhttp://www.ttec.co.tt/consumertips/conserveelectricity/default.htm
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Look up SEMICONWELL\nIntegrated Passive Networks .
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Advantage: Can be mounted to the desk or monitor in the form of a Boom or Gooseneck. Microphones that utilize the bias power from the sound card do not need an external or battery power supply which is an advantage if you are trying to use one with an older model laptop.\nDisadvantage: Is typically a condenser microphone requiring an external DC power source. The sound quality is lower
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Single sideband transmission can afford, "efficient spectrum use, bettter signal-to-noise ratios at low signal levels and better transmitter efficiency" per "Conclusion" on P. 7 of link.  Good luck.
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Monolithic microwave amplifiers are widely used in the industry for signal amplification. The majority of these amplifiers are specified to operate with fixed current. In the real world of low voltage supplies, fixed current is difficult to realize. Normally, a constant-current source is approximated by a voltage source, RF choke and a resistor.\n\nthe typical specifications of these amplifiers. One significant feature is that they can be operated over a wide voltage range, 2.8 to 5V. This makes them useable for battery powered applications\n\n\n\nhttp://360.yahoo.com/jcbroogley
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1) Cost of installing wired connections is much more than that of wireless\n\n2) Greater access to the intranet/internet.
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DSP is used to retrieve data from a signal, then shape that signal anyway you want. Since it is digital it is much more efficient than analog, instead of 3 active filters you need only the software.  Go here: \n\nhttp://www.bores.com/courses/intro/basics/1_whatis.htm
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RF Advantages:\n1. Not line of sight \n2. Not blocked by common materials: can penetrate most solids and pass through walls \n3. Longer range \n4. Not light sensitive \nNot as sensitive to weather/environmental conditions\n\n\n\nRF Disadvantages:\n1. Interference: communication devices using similar frequencies - wireless phones, scanners, wrist radios and personal locators can interfere with transmission \n2. Lack of security: easier to "eavesdrop" on transmissions since signals are spread out in space rather than confined to a wire \n3. Higher cost than infrared \n4. Federal Communications Commission(FCC) licenses required for some products \n5. Lower speed: data rate transmission is lower than wired and infrared transmission
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Actually, research shows that if in a cool environment, there's no concrete evidence that leaving one on is any worse than constantly turning one on and off.  You'll hear the preferences and theories of many, but the facts show no real difference.
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Optical isolation is used whenever there exisits the possiblity of a\nlarge voltage difference between the grounds of the two pieces\nof equipment being tied together via the communication line. In industrial situations there are often many volts\nof difference between the ground of one piece of equipment and\nanother, especially if they are fed from different transformers or\nsubpanels. By optically isolating the communication lines between\ntransceivers and controllers these voltage differences are no longer\na concern (up to a point, usually 1KV or more). The difference\nbetween the ground voltage of two or more pieces of equipment\narises due to resistive losses in the wiring, conductivity of the\nearth, and the currents running through those ground paths.\n\nIt makes no difference if we are discussing a CAN network or\nany other means of communicating using wires. There must\nbe total galvanic isolation (no metallic continuity) from one\nside of the optoisolator to the other. Normally, a specialized,\nisolated, low current supply is placed in each piece of equipment\nto power the optically isolated side of the transceiver hardware.