RF Receivers

RF Radio Frequency Receiver Circuits Page 2
RF Receivers: #'s A - B C - D E - K L - Q R - S T - U V - Z
Last Updated on: Friday, March 12, 2010 12:07 PM

Circuits Designed by Dave Johnson, P.E. :

175KHz INDUCTIVE PULSE RECEIVER
This circuit is discussed in more detain in the Experimenters Journal. The receiver’s six inch diameter coil detects the ring signal from the above transmitter and use a single NPN transistor to provided enough amplification for the signal to be easily viewed on an oscilloscope.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

A 70-W S-Band Amplifier For MMDS and Wireless Data/Internet Applications 12/11/00 - Application Note California Eastern Laboratories Doc #932 (app note added 2/06)

A Dual Mode Superhet/Direct Conversion AM receiver for 181.818 kHz Lowfer ATtiny2313, AT90S2313 - 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...(added 6/07)

Advanced VHF Power Meter - (diagram added 05/06/07)

AGC Amplifier features 60 dB dynamic range - 08/04/05 EDN Design Ideas / (added 8/05) Using discrete components only, build an audio-band AGC.

AM BCB radio receiver - (diagram added 05/06/07)

AM BroADCast Band Regenerative Receiver just two transistors! - (design added 6/07)

AM Radio PreAmplifier - (electronic schematic / circuit added 4/02)

AM receiver for aircraft communications - (diagram added 04/05/06)

AM/FM/SW active antenna - This circuit shows an active antenna that can be used for AM, FM, and shortwave SW. On shortwave band this active antenna is comparable to a20 to30 foot wire antenna. This circuit uses receivers that use untuned wire antennas, such as inexpensive units and car radios....(diagram added 05/06/07)

AM-Receiver for Aircraft communication 118.250MHz - (diagram added 05/06/07)

AN-502: Designing a Superheterodyne Receiver using an IF Sampling Diversity Chipset - AN-502 Analog Devices Application Notes (app note added 6/06) The AD6600/AD6620 Chipset Simplifies Receiver Design

AN714: Wireless Home Security Implementing Keeloq® and the Picmicro® Microcontroller - Microchip Application Note Published 12-Oct-99 (app note added 6/06)

AN758: Using the MCP2150 to Add IRDA® Standard Wireless Connectivity - Microchip Application Note Published 4-Jun-01 (app note added 2/06)

AN959: Using the PIC16f639 Mcu for Smart Wireless Applications - Microchip Application Note Published 10-Nov-04 (app note added 6/06)

Audio Circuit - Circuit design (added 02/05)

Automatic Gain Control AGC - (diagram added 05/06/07)

AV Audio/Video Wireless Transmitter - (circuit / schematic design added 6/06)

Basic RF oscillator - (diagram added 05/06/07)

Bipolar Regenerative Receiver - Contrary to what some radio experimenters think, a bipolar regenerative design can be made to work efficiently. The major concern is the low input impedance of the detector-amplifier bipolar….(electronic design added 08/03)

Bug detector - (electronic circuit added 05/06/07)

Bug Detector (mini) - This project is a handy piece of TEST EQUIPMENT. You can never have enough assistance when designing FM bugs. The first thing you need to know after putting a bug together is the fact it is transmitting.
This project gives you this indication. Once you know a bug is transmitting, you can work on getting the best output power and adjusting the frequency to a blank spot on the dial. (schematic added 04/09)

Build A One Transistor FM Radio - (project added 6/07)

Build your own Superheterodyne Receiver - 08/01/96 EDN-Design Ideas / (added 3/03) Cell phones aren't only devices to benefit from eversmaller and more highly integrated communications-IC technology. The simple, three-IC superheterodyne radio in Figure 1 can receive stations in 4.5to 10-MHz range from around world with only a 10-ft antenna. A superheterodyne radio works by mixing incoming RF signal with a local-oscillator....

Building a Simple LF Exciter - (circuit added 05/06/07)

RF Receivers: #'s A - B C - D E - K L - Q R - S T - U V - Z