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Amplifier
Circuits: RF (Radio Frequency)
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Amplifier --
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Last Updated on:
Wednesday, October 28, 2009 04:36 AM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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Scanning Voltmeter with Minimum Mass Wireless Coupler - ATMega8 A 10 bit
scanning voltmeter with a Minimum Mass Wireless Coupler, based on the ATMega8.Range to the
Minimum Mass Base Unit is 10 to 15 cm. If the voltmeter is battery operated, it can be
floated from ground. (circuit added 6/07) |
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Simple & Inexpensive High-Efficiency Power Amplifier Using New Apt MOSFETs -
Application Note Microsemi-formerly Advanced Power Technology APT9403 ( app note
added 2/07) |
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Simple 3 Transistor Audio Amp 50 Milliwatt - (circuit diagram added 6/07) |
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Simple Crystal Radio - The crystal radio gets its name from the galena crystal (lead
sulfide) used to rectify the signals. A "cat's whisker" wire contact was moved about the
surface of the crystal until a diode junction was formed. The 1N34A germanium diode
….(added 04/05/06) |
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Simple FM Stereo Transmitter - (schematic / circuit added 6/07) |
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Simple Method to Reduce DC Power Consumption in CDMRF Power Amplifiers Through the LMV225
& an Efficient Switcher - National Semiconductor Application Note (app note
added 6/06) |
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Simple Op Amp Radio (Bowden) - This is basically a crystal radio with an audio
amplifier which is fairly sensitive and receives several strong stations in the Los
Angeles area with a minimal 15 foot antenna. Longer antennas will provide a stronger
signal but the selectivity will be worse and strong stations may be heard in ... (circuit
added 04/05/06) |
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Simple Two-transistor Radio - Here is a simple radio that was designed to minimize
unusual parts; there isn't even a detector diode! The sensitivity isn't as high as the
one-transistor reflex but the simplicity is attractive. Strong stations will provide
plenty of volume ....(electronic design added 05/06/07) |
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Superhet/Direct Conversion AM receiver for 181.818 kHz - This is a description of an
experimental AM receiver for VLF. It is crystal controlled to receive 181.818 kHz (more or
less) and operates as either a single conversion superhetrodyne or a direct conversion
receiver. The bandwidths are expected to be 15 Hz to 3.5 kHz in superhet mode and 15 Hz to
10 kHz in the direct conversion mode....(added 6/07) |
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Terminal Interface with Minimum Mass Wireless Coupler - AT90S2313 This is a
Minimum Mass Wireless Coupler that connects a terminal, or PC running terminal software,
to other Minimum Masss Wireless devices by means of a 1200 baud data channel at 181.818
kHz. (circuits added 6/07) |
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Tiny Tuned Loop Antennas for the Minimum Mass Wireless Coupler - Loop Antennas are
considered to be "samall" when their diameter drops below about 1/10 of the wavelength
they are intended to be used at. In this case, I use the term "Tiny" because the antenna's
diameter is about 1/30,000 the wavelength, and at 5.5 cm....(design added 6/07) |
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TL431 Crystal Radio Amplifier - Here is a simple audio amplifier using a TL431 shunt
regulator. The amplifier will provide room-filling volume from an ordinary crystal radio
outfitted with a long-wire antenna and good ground. The circuitry is similar in complexity
to a simple one-transistor radio but the performance is far superior. The TL431….(added
04/05/06) |
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UHF TV PreAmplifier - This circuit is designed to work at UHF frequencies in the range
450-800MHz. It has a gain of around 10dB and is suitable for boosting weak TV
signals….(schematic added 9/02) |
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Very High Gain Crystal Earphone Amplifier - This simple, one-transistor amplifier
provides a voltage gain over 1000 (60 dB) for driving a high impedance ceramic (crystal)
earphone. The high gain is achieved by replacing the traditional collector resistor
….(added 04/05/06) |
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Wide Band RF Amplifier for 10MHz-500MHz Input - This paper describes an RF amplifier
circuit which is suitable for the frequencies between 10MHz and 500MHz. These kind of
amplifiers are called wide band amplifiers.(07/07/07) |
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Wireless for the Bench Top ATtiny12 - This section describes an experimental
low power, low bandwidth data signaling system that was initially made to operate at 55
MHz (television channel 2 in the U.S.). Before operating a radio transmitter, find out
what kind of transmitter operation, if any, is permitted in your locality. Radio
transmitter operation is a serious legal matter. This design ....(added 6/07) |
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RF (Radio Frequency):
#-C D-N
M-R S-Z |
