AM/FM Radio Receiver using BEL7220

The BEL, 7220 is an integrated AM/FM IC designed for economical and high quality receivers. The BEL

7220 IC can be used in battery or mains operated AM/FM receivers working from a nominal voltage of 1.6 to 6 volts. The functional block diagram is shown in Fig.l. With the exception of FM front end and audio output stage, the following functions are integrated.

(a) Pre-amplifier and double balanced mixer with AGC

(b) One pin local oscillator

(c) IF amplifier with internal AGC

(d) FM/IF amplifier and limiter

(e) Detector

(f) FM quadrature detector

(g) Audio pre-amplifier

The audio power amplifier

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Irkutsk Technical University scientists have developed a navigation device to search for tourists

The patent for device to monitor the position of the satellite groups and individuals received by employees Irkutsk State Technical University.

As the author of the design, an assistant professor of general studies, deputy director of the Irkutsk Technical University Technology Park Sergey Zakharov, device is the type of GPS-navigator, but with feedback function that allows finding lost travelers in remote places.

"Places that are attractive for tourists, often carry the potential emergencies. During the summer tourist season are lost every year dozens of people — explains Zakharov. — The possibility of occurrence of landslides,

Continue reading Irkutsk Technical University scientists have developed a navigation device to search for tourists

Ultrasensitive software GLONASS / GPS receiver SPIRIT

Innovative navigation product SPIRIT Telecom-GLONASS is software that runs on any processor Intel, including Intel Atom processors for mobile devices.

SPIRIT Telecom software does not require a separate GLONASS chip and works well on a netbook for $ 400, providing a reliable positioning, even inside buildings. Through the use of advanced technology work for attenuation and reflection of satellite signals and complex algorithms to combat noise, the sensitivity of the GLONASS receiver SPIRIT Telecom 10 times (10 dB / W) greater than that of a conventional GPS-receiver, which ensures reliable operation of the software SPIRIT Telecom indoors.

Continue reading Ultrasensitive software GLONASS / GPS receiver SPIRIT

Since May of this year begins mass production of receivers Geos-3

Since May of this year begins mass production of a new type of equipment users GLONASS — receiver "Geos-3". This was announced today at the VI International Satellite Navigation Forum zamgeneralnogo director, designer, "Russian Space Systems" / RCS / Grigory Stupak.

According to him, the philosophy of the development of the GLONASS system is defined feedback and needs of consumers. To improve the performance of the navigation system, the enterprise on its own initiative, a new receiver — "Geos-3". "It is competitive with current domestic and international advanced models," — said Stupak. At present, the issue is

Continue reading Since May of this year begins mass production of receivers Geos-3

The U.S. company Broadcom announced two models with support for GLONASS chips for phones and smartphones

The company Broadcom, whose GPS-chips are used in the iPhone 4, has announced two models with support for GLONASS chips for phones and smartphones. According to experts, you can now expect to see an iPhone with GLONASS.

The U.S. company Broadcom announced two single-chip solutions with support for GLONASS: BCM47511 combo chip and BCM2076, equipped with Bluetooth and FM-receiver. According to the manufacturer, solutions are designed for use in mobile phones, smart phones, portable navigation devices and media players. "As the increasing consumption of services connected with the definition of location, we are seeing a huge interest

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Geos-1M — is now home to the best receiver that is in the world

For the latest developments on the basis of the Russian navigation system GLONASS and new opportunities that they give to the Russians, the general director and general designer of JSC "Russian Space Systems" Yuri Matevich Urlichich. The joint special project "Voice of Russia" and the studio, "Roskosmos" (the Russian Federal Space Agency).

Urlichich … Now there is a greater demand for receivers GLONASS-GPS. And it’s all civil use in our country and other countries that use the two systems. Because consumers are, of course, do not want to depend on a single system, if you can take just

Continue reading Geos-1M — is now home to the best receiver that is in the world

Since May of this year begins mass production of receivers Geos-3

Since May of this year begins mass production of a new type of equipment users GLONASS — receiver "Geos-3". This was announced today at the VI International Satellite Navigation Forum zamgeneralnogo director, designer, "Russian Space Systems" / RCS / Grigory Stupak.

According to him, the philosophy of the development of the GLONASS system is defined feedback and needs of consumers. To improve the performance of the navigation system, the enterprise on its own initiative, a new receiver — "Geos-3". "It is competitive with current domestic and international advanced models," — said Stupak. At present, the issue is

Continue reading Since May of this year begins mass production of receivers Geos-3

Irkutsk Technical University scientists have developed a navigation device to search for tourists

The patent for device to monitor the position of the satellite groups and individuals received by employees Irkutsk State Technical University.

As the author of the design, an assistant professor of general studies, deputy director of the Irkutsk Technical University Technology Park Sergey Zakharov, device is the type of GPS-navigator, but with feedback function that allows finding lost travelers in remote places.

"Places that are attractive for tourists, often carry the potential emergencies. During the summer tourist season are lost every year dozens of people — explains Zakharov. — The possibility of occurrence of landslides,

Continue reading Irkutsk Technical University scientists have developed a navigation device to search for tourists

Ultrasensitive software GLONASS / GPS receiver SPIRIT

Innovative navigation product SPIRIT Telecom-GLONASS is software that runs on any processor Intel, including Intel Atom processors for mobile devices.

SPIRIT Telecom software does not require a separate GLONASS chip and works well on a netbook for $ 400, providing a reliable positioning, even inside buildings. Through the use of advanced technology work for attenuation and reflection of satellite signals and complex algorithms to combat noise, the sensitivity of the GLONASS receiver SPIRIT Telecom 10 times (10 dB / W) greater than that of a conventional GPS-receiver, which ensures reliable operation of the software SPIRIT Telecom indoors.

Continue reading Ultrasensitive software GLONASS / GPS receiver SPIRIT

Ultrasensitive software GLONASS / GPS receiver SPIRIT

Innovative navigation product SPIRIT Telecom-GLONASS is software that runs on any processor Intel, including Intel Atom processors for mobile devices.

SPIRIT Telecom software does not require a separate GLONASS chip and works well on a netbook for $ 400, providing a reliable positioning, even inside buildings. Through the use of advanced technology work for attenuation and reflection of satellite signals and complex algorithms to combat noise, the sensitivity of the GLONASS receiver SPIRIT Telecom 10 times (10 dB / W) greater than that of a conventional GPS-receiver, which ensures reliable operation of the software SPIRIT Telecom indoors.

Continue reading Ultrasensitive software GLONASS / GPS receiver SPIRIT

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