1. M

    How mixer works

    If L is a local oscillator signal and F is a radio frequency input signal, then the output of a mixer is F - L, F + L and other frequencies, if L and F are inputs to the mixer?
  2. H

    GPS receivers Front-End Design Problems

    I am designing a GPS L1(PWR=-160dBW) band Direct RF sampling receiver and the front-end: (passive antenna + LNA(21dB) + BGA1(30dB) + jumper + BPF(L1(fc=1575.42MHz,BW=15MHZ) + BGA2 (30dB) + BGA3(30dB) + VGA(-13.5 to +18 Gain Control in 0.5 dB Steps) ). all amplifiers are supplied with a +5 V...
  3. Adrienboub

    Frequency Range 4046 Proteus

    Hello everyone, First of all sorry for my bad english. I want to simulate on Proteus FM demodulation with 4046. I know that the center frequency Fo depends on the value of R1 and C1. I try to do this application circuit and it doesn't work too: I try to change the value of Fo according to the...
  4. Answerz

    PsOC 4 BLE (pins problems)

    I am running a project using a thermistor. I started by using the evaluation board as shown: The program runs fine. After that, I removed the module from the evaluation board and powered the module using an external power source (3V). I moved the resistor and thermistor from the evaluation...
  5. EventHorizon1003

    Active Coupling

    May I ask how do we coupling the two identical resonant circuits by using transistor?
  6. 8

    PCB design for STM32WB55CE Bluetooth MCU

    Hello, I designed a pcb around the STM32WB55CE. The RF design is meant for the capabilities needed for 2.4GHz bluetooth. I looked at the available AN's and did my first shot with the design. Please keep in mind, that this is my first RF circuitry. For the RF matching, I chose the IC provided by...
  7. F

    What Dual Gate MOSFET for small signal RF Amplifier circuit in HF band... & where to buy?

    Looking at HF receiver schematics on line I see many use Dual Gate MOSFET's as the first amplifier stage... and also for the mixer... mixing the incoming RF signal with the local oscillator. However all of the MOSFET's I've checked out seem to be out of production... and the ones I've found...
  8. A

    FM Circuit in Multisim

    HI friends i draw a circui in multiism for production of a FM signal but not working than k you in advance George