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Radio Circuits

SPICE projects of RF Audio, Video, Data Transmitters, Receivers, Transceivers, Every Tipologies of Modulators, Demodulators, RF Amplifiers, etc

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  • hartley oscillator

    Created by glagator, published on 21-03-2013

    Hartley oscillator with N-channel jfet

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    Project Type: Share

    Complexity Spice Software Software Version Full version Components number
    Intermediate NI Multisim 10 No 11-20

    Path: SPICE Projects > Radio Circuits > RF Amplifiers

  • DSBFC and DSBSC AM modulation with the IC AD633

    Created by tobytone, published on 22-12-2012

    The AD633 IC is a four-quadrant analog multiplier with differential X and Y inputs, and a high impedance summing input (Z). with the Z input connected to the carrier we obtain a double sideband full carrier modulated signal (DSBFC), if the Z input is connected to the ground the modulator produces a Double-sideband suppressed carrier signal (DSBSC) eliminating the carrier and transmitting the sidebands only. Here it's tested in both mode with a speech txt file as input signal.

    FREE

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    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate PSpice 16.3+ Yes <10

    Path: SPICE Projects > Radio Circuits > Modulators

  • AM Modulator with JFET Input Operational Amplifier

    Created by tobytone, published on 18-12-2012

    a modulating signal, in this case a 2 khz sinusoidal frequency, modulates the amplitude of the 100 khz carrier.This modulation is also called double sideband full carrier (DSBFC) and produces in the spectrum a fcarrier+fmodulating, and fcarrier-fmodulating frequency components, with a bandwidth of 2*fmodulating, 4 khz. The operational amplifier is a LF411.

    FREE

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    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Simple PSpice 9.1+ No <10

    Path: SPICE Projects > Radio Circuits > Modulators

  • Single Channel 4 bit Pulse Code Modulation Transmitter

    Created by tobytone, published on 12-12-2012

    This circuit is a PCM system that uses 4 of the 8 bits available. The input signal is a 1Khz sinusoidal sampled at 8khz, which is the rate used in the public switched telephone network (PSTN), and the ADC parallel output it's converted to a serial bit stream. To show the recovered signal, a serial to parallel converter and a DAC is attached to the transmitter. The DAC output is low pass filtered.

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate PSpice 9.1+ No 11-20

    Path: SPICE Projects > Radio Circuits > Modulators

  • SPICE Simulation of NE600P Mixer Circuit

    Created by MicroCapDesigner, published on 31-10-2012

    Integrated circuit for low power communication systems from 800-1200 Mhz. The receiver consists of a single balanced mixer with four bipolar transistors.

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Micro-Cap 9+ No 31-50

    Path: SPICE Projects > Radio Circuits > Receivers

  • NPN Transistors Double Balanced Mixer

    Created by MicroCapDesigner, published on 10-05-2012

    This mixer is usable for frequencies around 500Mhz. Discrete transistors mixers require the matching of the transistors' characteristics. This issue is overcome by applying a bit of feedback through emitter resistors. The base are driven with LO signal from a balun transformer. This mixer exhibits a conversion loss of 6dB and 15 to 17dBm of LO drive power.

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Micro-Cap 10+ No 21-30

    Path: SPICE Projects > Radio Circuits > Receivers

  • Gilbert Mixer with CMOS 0.35 micron

    Created by MicroCapDesigner, published on 03-05-2012

    This circuit implements a CMOS conversion gain active mixer. The voltage conversion gain is the ratio of the RMS voltages of IF and RF signals.The power conversion gain is the ratio of the power delivered to the load and the power available to RF input.

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Micro-Cap 9+ No 31-50

    Path: SPICE Projects > Radio Circuits > Receivers

  • Diodes Dual Double Balanced Mixer

    Created by MicroCapDesigner, published on 24-04-2012

    In this circuit both radio and local oscillator frequencies are suppressed in the output signal and the same for even order LO and RF harmonics. It provides an high degree of port to port isolation

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Micro-Cap 9+ No 21-30

    Path: SPICE Projects > Radio Circuits > Receivers

  • PWM Demodulator with Operational Amplifiers

    Created by TINADesigner, published on 02-11-2011

    PWM demodulator implemented with an active low-pass filter with TL071 and TL072 operational amplifiers.

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Tina 7+ Yes 21-30

    Path: SPICE Projects > Radio Circuits > Demodulators

  • PWM Modulator with Operational Amplifiers

    Created by TINADesigner, published on 31-10-2011

    Pulse Width modulation modulator circuit implemented with 4 operational amplifiers, 2 LP3111 and 2 TL072. A first couple provides a triangular waveform compared with the message input signal. A last operational amplifier works as buffer.

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Tina 7+ Yes 11-20

    Path: SPICE Projects > Radio Circuits > Modulators

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