Patent ID: 6959472
Filing Date: 2005-11-01
Classification: H03B,H03H,H04R,Y10T

Abstract:
1. A method for manufacturing a quartz crystal oscillator, comprising the steps of: forming by at least one of a chemical etching method, a physical etching method, and a mechanical method a quartz crystal tuning fork resonator having a quartz crystal tuning fork base and first and second quartz crystal tuning fork tines each connected to the quartz crystal tuning fork base and having a first main surface and a second main surface opposite the first main surface, the quartz crystal tuning fork resonator having a fundamental mode of vibration and a second overtone mode of vibration each comprised of a flexural mode of an inverse phase, a series resistance R providing an amplification circuit having at least an amplifier, a negative resistance −RL providing a feedback circuit having the quartz crystal tuning fork resonator and a plurality of capacitors; and electrically connecting together the amplifier of the amplification circuit and the quartz crystal tuning fork resonator and capacitors of the feedback circuit; wherein a ratio of an absolute value of the negative resistance −RL wherein a merit value M