nirs vs rf (near inrfared ) vs (radio frequency )
2008-12-09 20:44:00 nir spectrometer vs radio frequency moisture sensor applycation on food solids any help prices of sensors
software for Radio Frequency(RF)
2008-12-04 08:28:00 Is their any software avaliable for Radio Frequency(RF) module simulation.
Radio Frequency Ablation Devices
2007-12-19 05:38:00 FDA alerted healthcare professionals of reports of patient deaths associated with the use of radio frequency (RF) ablation devices during lung tumor ablation. Patient selection, subsequent treatment, and technical use of the RF device, including placement and operation, may have contributed to the fatalities. While RF ablation devices have been cleared for general indications- ablation of soft tissue by thermal coagulation necrosis- the devices have not been cleared specifically for lung tumor ablation. Healthcare professionals should use caution when operating RF ablation devices, adhering strictly to information contained in the labeled operating instructions, Operators Manual, the Manufacturer's Instructions for Use and any training provided. Additionally, if healthcare professionals plan to use RF ablation devices to treat patients with lung tumors, they should consider enrolling patients in an approved clinical study, where training is available. Source: http://www.fda.gov/cdr...
Radio Frequency Identification
2007-11-06 23:24:00 Radio frequency identification (RFID) is an identification system that uses radio waves to send data, and RFID tags or transponders. The first patented RFID device was a passive radio transponder with an integrated memory by Mario Cardullo. At present, the technology has many applications, particularly in the retail industry because of its small ...
Cancer Cure Radio Frequency Series with John Kanzius (3 parts)
2007-10-01 21:04:00 The Cancer Cure Radio Frequency Series is news coverage of a very interesting Cancer Cure project in hyper drive. If you follow Alternative Medicine you know how unusual it is to see a Cancer Cure in the news. Without going into all the drama of why most Cancer Cure projects don't make to the general public level, it looks like this project has enough people, money and news behind it, that it might just make it -- into actually helping people. John Kanzius isn't a doctor, he doesn't even have a medical background. Kanzius is a former radio and TV engineer and one-time station owner, Kanzius, who suffers from leukemia, hated his chemotherapy and saw its devastating effect on others. He hopes cancer treatments could work something like this: A patient would be injected with tiny metal nano-particles, which would be carried through the bloodstream by a targeting molecule and attach only to cancerous cells. The patient would then be exposed to an energy field created by radio w...
FM Transmitter with 2N2222
2007-09-10 17:46:00 The range of the transmitter when running at 9V is about 300 feet. Running it from 12V increases the range to about 400 feet. Parts C1 1 0.001uf Disc Capacitor C2 1 5.6pf Disc Capacitor C3,C4 2 10uf Electrolytic Capacitor C5 1 3-18pf Adjustable Cap R1 1 270 Ohm 1/8W Resistor 270 Ohm 1/4W Resistor R2,R5,R6 3 4.7k 1/8W Resistor 4.7K 1/4W Resistor R3 1 10k 1/8W Resistor 10K 1/4W Resistor R4 1 100k 1/8W Resistor 100K 1/4W Resistor Q1, Q2 2 2N2222A NPN Transistor 2N3904, NTE123A L1, L2 2 5 ...
1.5 Volt Tracking FM Transmitter
2007-09-10 17:40:00 Operates from 87-109MHz. The current draw for this tracker is 3.7mA, so the 1.5V button cell will last a while. My experimental version was tuned to 87.6MHz and worked as expected on only 1.5 volts. When your circuit is working you should see the LED flash quite fast. Take your FM radio and search for the ...
VHF Video Transmitter
2007-09-09 12:22:00 This circuit is a powerful video sender in VHF band. The modulator section is designed to operate on either channels 7 to 13 or 14 to 29. For channels 7 to 13, L1 and L2 are 3 turns of #22 wire wound on a 3/16 inch form. For channels 14 to 29, L1 and L2 ...
Video to RF Modulator 189 MHZ
2007-09-09 12:16:00 This circuit is a RF modulator which can be used for modulating of video signals. The P1 controls the Light and the P2 controls the contrast of video signal. The RF modulated output signal can be received on the VHF band ( about 189 MHz ). Note that the circuit don’t modulate ...
AM portable radio receiver by ZN414 IC
2007-09-03 18:12:00 Circuit : Andy Collinson Email: anc@mitedu.freeserve.co.uk Description: An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Notes: Designed around the popular ZN414 IC this receiver covers the medium wave band band from approximately 550 to 1600 KHz with the values shown. The ...
60 WATTS LINEAR AMPLIFIER with IRF840
2007-08-29 18:13:00 The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840. The IRF series of power transistors are available in various voltage and power ratings. A single IRF840 can handle maximum power output of 125 watts. Since these transistors are used in inverters and smps they are easily available for around ...
RF Power Amplifier 1.3W to 6W by 2SC1970
2007-08-06 09:52:00 This amplifier is based on the transistor 2SC1970 and 2N4427. The output power is about 1.3W and the input driving power is 30-50mW. You can use other transistor as 2SC1971 and get much more output power. 1.3W will still get your RF signal quit far and I advice you to use a good 50 ohm ...
One Watt 2.3 GHz RF Amplifier using a MRF2001(Image)
2007-07-29 07:49:00 One Watt 2.3 GHz RF Amplifier using a MRF2001(Image) radio frequency, RF (Radio Frequency)Share This
RFI Suppression Techniques in DP83950A (RIC) Based Systems
2007-07-29 07:48:00 RFI Suppression Techniques in DP83950A (RIC) Based Systems: National Semiconductor Application Note (PDF File) radio frequency, RF (Radio Frequency)Share This
RF Frequency Linear Tuning Varactors (PDF File)
2007-07-29 07:15:00 RF Frequency Linear Tuning Varactors: MicroNote 705 from Microsem (PDF File) RF (Radio Frequency)Share This
An AM RF Amp for Internal Antennas
2007-07-29 06:51:00 by Bruce Carter This page is based on the article: “AM Radio Booster” by Gary McClellan, Radio Electronics, April 1972, page 25. Figure 1 shows the antenna input circuitry of a typical AM radio. There may be some slight variations on this, but the circuit described here will compensate for them. Read More Source ...
FM TRANSMITTER By 2N2222
2007-07-27 09:06:00 There is a lot more to designing an FM transmitter, than meets the eye. Here is a typical FM transmitter circuit. It consists of 3 stages. An audio amplifier, RF Oscillator and RF output. Read More Source : http://www.talkingelectronics.c-om/te_interactive_index.html FM Antenna Amplifier, FM Transmitter, RF (Radio Frequency)Share This
Active FM Antenna Amplifier by C2570
2007-07-13 09:10:00 My friend to need circuit FM Antenna Amplifier. I find circuit, to see good web: http://www.uoguelph.ca/~antoon/-circ/activefm.html Content in Article : I copy to you. thank you Tony van Roon Parts List: R1 = 27K R2 = 270 ohm R3 = 1K Tr1,Tr2 = 22pF, trimmer cap (15-40pF) C1,C2 = 5.6pF C3 = 0.001uF (1nF), ceramic C4,C5 = 10pF, ceramic C6 = 0.1uF (100nF), ceramic Q1 = 2SC2498, ...
FM Stereo Transmitter with IC BA1404
2007-07-09 20:56:00 You’ll find that this is a very easy project to build. It will transmit good quality sound in the FM band ( 88 - 108 mhz ). One inportant item is that the IC chip operates on 3 volts DC. The chip will get destroyed if it is operated on any voltage higher than 3.5 ...
Linear FM 30Watt
2007-06-24 04:26:00 Manufacture: Soulis Papanastasiou Copyright: Technical Election Cost of manufacture: 52,80 € A amplifier of medium force RF for the FM, is always essential for the amateur that wants it strengthens some small transmitter, that likely it has already it manufactured! The present circuit can give force 25-30W, with control no ...
Easy Radio Wave Alarm
2007-06-23 19:31:00 Radio Wave Alarm by Rev. Thomas Scarborough - scarboro@iafrica.com This simple circuit is sure to have the police beating a path to your door - however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat. radio wave alarm The circuit transmits on Medium Wave (this is the small problem ...
UHF Preamplifier by MPSH10 transistor
2007-06-21 07:04:00 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. The circuit is shown below The MPSH10 transistor used is available from Maplin Electronics order code CR01B. Alternatives that may be used instead are BF180 and BCY90. The ...
High Pass Active Filter by LM741
2007-06-19 11:39:00 High Pass Active Filter by LM741 741, basic electronics, circuit, RF (Radio Frequency)Share This
60Hz Notch Filter by LM741
2007-06-19 11:36:00 60Hz Notch Filter by LM741 741, basic electronics, circuit, RF (Radio Frequency)Share This
ROCKY MOUNTAIN NATIONALS COMPETITOR RADIO FREQUENCY NOTICE
2007-06-07 19:01:00 Attention: All Rocky Mountain Nationals competitorsDue to the proximity of Castrol Raceway to the Edmonton airport, the following radio…
TV Transmitter
2007-06-05 18:37:00 Circuit :David Kwaku Celestin - Ghana, West Africa Email :mightycelestin@yahoo.co.uk Description: A VHF band TV transmitter using negative sound modulation and PAL video modulation. This is suitable for countries using TV systems ...
FM Transmitter with Op-amp
2007-06-02 06:46:00 Source :: http://www.zen22142.zen.co.uk/C-ircuits/rf/txcct.htm By Kamran Ahmed - UK Parts List: R1 4K7 R4 150K R7 3K9 (2K7) R2 4K7 ...
2 Transistor (BC548) FM Voice Transmitter
2007-05-25 19:22:00 Source :: http://www.zen22142.zen.co.uk/C-ircuits/rf/2bjttx.htm Take care with transmitter circuits. It is illegal in most countries to operate radio transmitters without a license. Although only low power this circuit may be tuned to operate over the range 87-108MHz with a range of 20 or 30 metres. Notes: I have used a pair of BC548 transistors in this circuit. Although ...
Radio Frequency Integrated Circuit Design [John Rogers, Calvin Plett (Artec
2007-03-18 19:11:00 http://rapidshare.com/files/215-05938/Radio_Frequency_Integrate-d_Circuit_Design__John_Rogers__-Calvin_Plett__Artech_House_2003-__.pdf?Size = 9.7 MB
Introduction to radio-frequency communication
2007-02-06 20:40:01 File : 5.7 MB, 201 pages Navy Electrical and Electronic Training Series - Modul 17 1. Introduction to Radio-Frequency Communications 2. Introduction to Communications Theory 3. Fundamental Systems Equipment 4. Introduction to Satellite Communications 5. Introduction to Miscellaneous Communications Systems and Equipment TRANSMITTER FUNDAMENTALS Basic communication transmitters include continuous wave (cw), amplitude modulated (AM), frequency modulated (fm), and single sideband (ssb) types. A ...
In a U.S. government warning coins with tiny radio frequency
2007-01-16 15:55:01 In a U.S. government warning coins with tiny radio frequency transmitters hidden inside were found planted on U.S. contractors with classified security clearances on at least three separate occasions between October 2005 and January 2006 as the contractors traveled through Canada. Intelligence and technology experts said such transmitters, if they exist, could be used to surreptitiously track the movements of people carrying the spy coins. >>
Introduction to radio-frequency communication
2006-12-26 08:10:02 File : 5.7 MB, 201 pages Navy Electrical and Electronic Training Series - Modul 17 1. Introduction to Radio-Frequency Communications 2. Introduction to Communications Theory 3. Fundamental Systems Equipment 4. Introduction to Satellite Communications 5. Introduction to Miscellaneous Communications Systems and Equipment TRANSMITTER FUNDAMENTALS Basic communication transmitters include continuous wave (cw), amplitude modulated (AM), frequency modulated (fm), and single sideband (ssb) types. A [...]
Introduction to radio-frequency communication
2006-11-09 10:23:00 File : 5.7 MB, 201 pages Navy Electrical and Electronic Training Series - Modul 17 1. Introduction to Radio-Frequency Communications 2. Introduction to Communications Theory 3. Fundamental Systems Equipment 4. Introduction to Satellite Communications 5. Introduction to Miscellaneous Communications Systems and Equipment TRANSMITTER FUNDAMENTALS Basic communication transmitters include continuous wave (cw), amplitude modulated (AM), frequency modulated (fm), and single sideband (ssb) types. A ... |
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