The second figure illustrates an oscillator where the amplifier contains two units in coupling DC, the IC1 and the output. The IC1 acts as an amplifier while the output consists of transistor Q1 and Q2. This allows the oscillator to power loads bigger than 50R. The parallel combination of diodes D1 and D2 with resistor R1 handles the automatic gain modification. The function of placing the resistor R1 in parallel with the diodes is to keep the distortion in low level at about 1% to 5% and reduce the non linearity of combination. Without increasing the distortion, the frequency of oscillation can increase up to 20 KHz which is enough to couple the DC. But based on the values of components used, the circuit will produce a frequency of 1 KHz. It can be varied by changing the values of the resistors and capacitors without using electrolyte capacitors. It is also suggested to have values where R1 is equal to R2 and C1 is equal to C2.