Projects

Modulators

SPICE projects of every Tipologies of Modulators

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  • 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

    (only to registered users)

    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

    (only to registered users)

    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

  • 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

  • ASK Modulator

    Created by TINADesigner, published on 26-10-2011

    Amplitude Shift Keying modulator uses a XR2206 function generator to provide an high quality sine wave carrier which is combined with the input digital signal through a 74HC4066 quad bilateral switches.

    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 > Modulators

  • AM Modulator with XR2206

    Created by TINADesigner, published on 20-10-2011

    A DC bias and a modulating signal is applied to the pin1 AMSI (Amplitude Modulating Signal Input). The internal impedance is approximately 100k. Output amplitude varies linearly with the applied voltage at Pin 1, for values of DC bias at this pin, within 14 volts of VCC/2.

    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 > Modulators

  • FSK Modulator with XR2206

    Created by TINADesigner, published on 18-10-2011

    Frequency Shift keying modulator with a XR2206 that can be operated with two separate timing resistors, R 1 and R 2 , connected to the timing Pin TR1( 7) and TR2( 8),respectively. The output frequency can be keyed between two levels. f 1 and f 2 , as: f1 = 1/(R1*C) and f2 = 1/(R2* C)

    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 > Modulators

  • FM Modulator with a XR2206

    Created by TINADesigner, published on 14-10-2011

    FM modulator implemented with a precision sine waveform generator IC XR2206.Frequency of operation can be selected externally over a range of 0.01Hz to more than 1MHz

    FREE

    (only to registered users)

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number Documents
    Intermediate Tina 7+ Yes 21-30 1

    Path: SPICE Projects > Radio Circuits > Modulators

  • Tuned Mixer with JFET

    Created by Cribald, published on 27-09-2011

    Tuned Mixer implemeted with a JFET and a resonant circuit to the Intermedy frequency of 455khz. Image frequency effect.

      $ 2

    Buy

    Project Type: Share

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

    Path: SPICE Projects > Radio Circuits > Modulators

  • FM Modulator with VCO implemted with JFET Hartley Oscillator and Varactor

    Created by Cribald, published on 22-04-2011

    VCO implemented with a resonant Hartely oscillator circuit with a resonce frequency of 4Mhz and a JFET

      $ 2

    Buy

    Project Type: Share

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

    Path: SPICE Projects > Radio Circuits > Modulators

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