2 transistor buffer


Posted on Feb 5, 2014

When designed with general purpose small-signal transistors, the bandwidth is 50MHz to 250MHz so very careful grounding and power supply decoupling is required. Simulation schematic for 2 transistor buffer. *Copyright Poul Petersen 2009 * *Some standard Spice stuff.


2 transistor buffer
Click here to download the full size of the above Circuit.

Due to copyright issues models from other sources are not *included here. They can be downloaded from the manufacturers` *web sites. . Lib C:LIBsSpiceetex_dl. lib * *Signal generator VIN 101 0 AC 1 SINE(0 5 1000 0 0 0) * *Power supply Vcc Vcc 0 30 * *Load resistor value. PARAM Rl=10K. STEP PARAM Rl LIST 100 1000 10000 *100R load resistance is included to emphasize the clipping of the *single transistor circuit. Cross over distortion is very high into *100R for the 2 transistor circuit. * *Single transistor buffer. R111 101 11 1 ; Series resistor from generator. C11 11 12 10u R11 Vcc 12 47K R12 12 0 47K Q11 Vcc 12 13 ZTX653 ; from R13 13 0 3K C12 13 14 220u R14 14 0 {Rl} * *2 Transistor buffer with single supply. R121 101 21 1 ; Series resistor from generator. C21 21 22 10u R21 Vcc 22 47K R22 22 0 47K Q21 Vcc 22 24 ZTX653 ; from R23 24 0 5. 9K Q22 0 22 23 ZTX753 ; from R24 Vcc 23 5. 9K C22 23 25 100u C23 24 25 100u R25 25 0 {Rl} * ;. DC TEMP 0 70 10. AC DEC 10 100m 1MEG ;. NOISE V(25) VIN DEC 10 10 100K ;. TRAN 2m. PROBE. END *




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    RS485-like multi-drop bus
    Bluetooth for Symbian OS Mobiles
    Led Millivoltmeter
    USB Audio Interface based DAC PCM2902
    Electronics Circuits Reference Archive Audio LED VU meter
    optoisolated adapter
    water level indicator
    low frequency sinewave
    Automatic LED Emergency Light Circuit
    Hakko 936 ceramic heater A1321
    How to Control Electronic Circuits Using a Computer and the BASIC Programming Language
    LM1036 volume controller equalizer electronic project
    RS485 Communication Connectors
    74S124 High Frequency VCO with Varactor
    With NE555 making push-button delay section lamp circuit
    Monostable circuit diagram of the use of video amplifiers and comparators
    The reference voltage of the symmetrical bipolar comparator
    A sequence of opening and closing the outlet circuit
    Offset + 2% - temperature coefficient temperature compensation circuit
    Karaoke with integrated echo circuit



    Top