The resistor {TAIL ~ R1} and the two capacitors {HEAD ~ C1} and C2 serve to dimension the circuit 
The resistor { TAIL ~ R1 } and the two capacitors { HEAD ~ C1 } and C2 serve to dimension the circuit
OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH