San Jose, CA (June 8, 2011)–Lauten Audio and Dr. Charles Chen Ph.D. have filed for a new patent related to microphone-capsule biasing.
The invention relates to a double-bias circuit for condenser microphone capsules that generates a balanced output directly from a condenser capsule without the need for a phase splitter or transformer in the circuit path.
Dr. Chen explains, “For the traditional single-bias circuit, only one signal is retrieved from the capsule. To generate two balanced signals from the single signal, the options are to use an output transformer, or a phase-splitter circuit in the case of a transformer-less design. The problem is these types of phase-splitter circuits restrict the dynamic range allowed.”
Dr. Chen’s double-bias invention reportedly allows for a balanced output directly from the condenser capsule, so no output transformer or phase-splitter stage is needed. Current splitter circuits result in distortion or clipping of the two output signals, negatively affecting the dynamic range. Dr. Chen’s new double-bias circuit is said to overcome this; Lauten Audio plans to implement the new invention into future models of condenser microphones.