Input and Output Impedances of Single to Differential mode converter

I have this circuit that converts a single ended input signal to differential output signal. I want to understand how to calculate or find out its input and output impedances?

The two op-amps are in inverting and non-inverting configuration. Will this circuit work correctly as single to differential mode converter or should both of the op-amps be in the same configuration?

• what range of frequencies must you handle? – analogsystemsrf Nov 18 '19 at 15:06

The input impedance of the inverting input is $$\330R \parallel 660R\$$. The output impedances are small, approximately $$\33R\$$ on each branch.
• For one, you can use a voltage follower to buffer $V_{\text{in}}$ – Scott Seidman Nov 18 '19 at 13:54