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oscillator circuit

This oscillator works at 1.1 MHz frequency and its amplitude is 0.4 volt but I want to increase it to between 4 to 6 volts.

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  • \$\begingroup\$ Add an amplifier. \$\endgroup\$ Commented Oct 28, 2015 at 15:17
  • \$\begingroup\$ Are you sure it oscillates at 1.1 MHz? Looks more like something around 10kHz with those component values. \$\endgroup\$
    – Andy aka
    Commented Oct 28, 2015 at 15:36
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    \$\begingroup\$ Where are you measuring the amplitude? \$\endgroup\$
    – user16324
    Commented Oct 28, 2015 at 15:43
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    \$\begingroup\$ i measured it in laboratory with oscilloscope \$\endgroup\$ Commented Oct 28, 2015 at 15:48
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    \$\begingroup\$ Where? Brilliant! \$\endgroup\$
    – Transistor
    Commented Oct 28, 2015 at 21:49

2 Answers 2

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C127 is way way too big reduce it and your output will increase .In fact its normally smaller than C129 because a common base transistor has lots of gain at 1.1 MHz.Infact you could swap c127 and c129 .Also swap R217 and R 218 .

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Use power amplifer transistor to get desired output. But remember that circuit of this type have an issue of stability.

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