Hi guys,
On a power amp I'm designing I have a strange clipping behaviour that does'nt show up on simulation. In the negative half cycle the transistor seems to 'stick' on, followed by a turning off spike. This happens at higher frequencies, and gets worse as frequency increases. I was wondering if someone could point me in the right direction as to what could be causing it. I have attached some oscilloscope pics and a pic of the circuit to help clarify what I mean. The fuzziness in the second pic ( clipping with no spike ) is due to the glass on the CRO.
Thanks.
On a power amp I'm designing I have a strange clipping behaviour that does'nt show up on simulation. In the negative half cycle the transistor seems to 'stick' on, followed by a turning off spike. This happens at higher frequencies, and gets worse as frequency increases. I was wondering if someone could point me in the right direction as to what could be causing it. I have attached some oscilloscope pics and a pic of the circuit to help clarify what I mean. The fuzziness in the second pic ( clipping with no spike ) is due to the glass on the CRO.
Thanks.


