Single supply op-amp query

[johns at oei.com]

     I have a theremin that gives a weak 2.5V max CV output that I need to 
     boost to around 10V max.  I would like to add a voltage amplifier to 
     scale the voltage to a usable level.  Unfortunately the theremin only 
     uses a single voltage power supply.  So in order to scale the CV 
     higher, I will need to use a some single supply op-amp.  
     
     I browsed over several National Semi data and application books and 
     could only find that they suggested using a LM3900 for single supply 
     operation.  The problem with the LM3900 when used as a positive 
     voltage (0V to <+V) amplifier with a single supply is that you can't 
     let the input go below .5V because you need to keep the input diodes 
     forward biased.  So you can see that a hefty portion of the CV range 
     will be wasted if my input range is only 0V-2.5V.  Basicly, the LM3900 
     in only linear on input voltages from .5V to <+V
     
     Does anybody know of some available op-amp that can provide a 
     programmable gain with a single supply and input signal down to 
     ground?
     
     John Speth - johns at oei.com