US Patent 10469061 Quadrature clock generator and method thereof

A method including operations of receiving an input clock at an input node, coupling the input node to a first internal node using a first capacitor, inverting a first internal signal at the first internal node into a first interim signal at a first interim node using a first inverter, coupling the first interim node to the first internal node using a first resistor, coupling the input node to a second internal node using a second resistor, inverting a second internal signal at the second internal node into a second interim signal at a second interim node using a second inverter, coupling the second interim node to the second internal node using a second capacitor, and using a buffer to receive the first interim signal and the second interim signal and output a first phase and a second phase of an output clock.