Disclosed is an inverter cell design comprising first and second transistors and first and second resistors. In disclosed embodiments, the first resistor is connected to a source of the first transistor and the second resistor is connected to a source of the second transistor. The first and second resistors are configured for connection to respective first and second voltage potentials. The inverter cells may be configured in a ring oscillator. A crystal oscillator may comprise an inverter cell according to the present disclosure.