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28th October 2003, 10:07 AM
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#2 |
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diyAudio Member
Join Date: Jan 2003
Location: Enschede
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A non-inverted and an inverted gainclone...
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28th October 2003, 11:29 AM
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#3 |
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diyAudio Member
Join Date: Jul 2003
Location: Huddinge, Sweden
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Oh, no!
 That's a BridgeClone. A balanced clone is made up from two identical circuits with the loudspeaker connected between the outputs. The inputs are driven by a balanced output from a preamp. Rune
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28th October 2003, 11:59 AM
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#4 |
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diyAudio Member
Join Date: Jun 2002
Location: East side of Milano
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I'm working on it.
It will be formed by a couple of 3 paralleled devices in non-inverting mode. I'm using a +-24V at supply rails. It will be drived by a Pass' Balanced Line Stage at aprox 60V supply voltage. Actually it's not finished so I can't tell you if it's better or not than the BridgeClone  I will use a 25dB feedback formed by high precision resistors so to avoid the use of servos, but I will also drill some additional vias to put one if needed. HTH. Bye, Fabrizio |
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28th October 2003, 04:29 PM
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#9 |
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diyAudio Member
Join Date: Dec 2001
Location: SIUE, Illinois, USA
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the input imedance of both paths is not equal. this prevents it from being balenced. it is differenetial input, thoguh. notcie the input impedacne of Vin- is R1 + R0, where the input impedacne of Vin+ is dependent on signal presented to Vin-.
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28th October 2003, 04:30 PM
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#10 |
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diyAudio Member
Join Date: Oct 2003
Location: Toronto
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I’m not exactly sure of the advantages/disadvantages of the two circuits I posted. Second one has matched + and – input impedance’s but the input DC biasing is not that good. Can anyone enlighten me on the subject. I guess the 3 opamp version will be the best of both worlds.
Greg |
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Balanced Gainclone circuit
