A clock generator is disclosed that includes an array of MEMS resonators and a test circuit. The test circuit is operable at start-up to operate one or more of the MEMS resonators to generate test output and analyze the test output to determine whether the operated MEMS resonators meet test criteria....http://www.google.ca/patents/US7941723?utm_source=gb-gplus-sharePatent US7941723 - Clock generator and method for providing reliable clock signal using array of MEMS resonators