# What is the purpose of the capacitor in this circuit?

Is the purpose of the capacitor, C1, to filter out any possible DC component that the input signal has?

• It's also called a "DC blocking capacitor". It can only filter "certain frequencies" to the extent that the product $C_1 R_5$ determines the frequency range where it transitions from blocking to conducting. – TimWescott Apr 3 at 21:18