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Amplifiers Circuits - IF Intermediate Frequency

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

AN-1020: Demodulating with the LMX2240 150 MHz IF Receiver - National Semiconductor Application Note

AN-502: Designing a Super heterodyne Receiver using an IF Sampling Diversity Chipset - AN-502 Analog Devices Application Notes. The AD6600/AD6620 Chipset Simplifies Receiver Design

Audio Circuit - Circuit design

Constant-impedance IF bandpass filters improve circuit performance - Application Note MiniCircuits.com 

Demodulating with the LMX2240 150 MHz IF Receiver - National Semiconductor Application Note

Designing a Superheterodyne Receiver using an IF Sampling Diversity Chipset - AN-502 Analog Devices Application Notes. The AD6600/AD6620 Chipset Simplifies Receiver Design

HDT Technology Adds Power to CDMA Chip Set - RF Micro Devices Application Note TA0003

I.F. Amplifier - The I.F. transformer primary has 18 turns, the secondary winding has 4 turns. The capacitors across the IFT primaries are 82pF. The input/output transformer has 12 turns, tapped at 3 turns from ground. This transformer is wound on a ferrite core. The mosfets are 3SK45's. The diodes in the product detector are 1N34's. I use a six pole SSB filter from a scrap CB. The centre frequency is 7.8MHz. The -6db bandwidth is about 2.5KHz.

A High Gain Integrated Circuit RF-IF Amplifier

LM1823High Quality TV Video I.F. Amplifier & Synchronous Detector for Cable Receivers - National Semiconductor Application Note 09 Apr1996

Low Distortion IF Amplifier/ ADC Driver with Digitally Controlled Gain - Linear Technology LT5524

Trimless IF VCO: Part 1: Design Considerations - This application note explores the design fundamentals needed to implement a trimless, fixed-frequency, IF voltage-controlled oscillator (VCO) and points out the challenges in guaranteeing proper circuit operation. VCOs are essential components in the architecture of most wireless systems. In dual-conversion approaches, a fixed-frequency....  APP 711: Feb 05, 2001

Tunable IF with TDA7000 - The main motive of the mods was not that the circuit didn't work right, but were several tries to add some kind of frequency indicator to the receiver. The left RCA plug and associated components are witnesses to the last version, adding a FET buffer amplifier and taking signal from the oscillator coil.

UltraLow Distortion IF Amplifier/ ADC Driver with Digitally Controlled Gain - Linear Technology LT5514.

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