Oven controlled crystal oscillator
AssigneeNihon Dempa Kogyo Co., Ltd.
InventorJunichi Arai
Life of this patent
Estimating the term…
Abstract
An oven controlled crystal oscillator that ensures reduced heat influence from outside to further stabilize an output frequency is provided. The oven controlled crystal oscillator includes a substrate secured above a base. The oven controlled crystal oscillator includes an oscillator circuit, a heater resistor, and a power transistor, which are mounted on the substrate. The oven controlled crystal oscillator includes pins that secures the substrate above the base at a predetermined interval, a metal cover that covers the oscillator circuit, the heater resistor, and the power transistor, and a resin cover that covers outside of the metal cover. An air layer is formed between the metal cover and the resin cover.
Claims10
An oven controlled crystal oscillator having a base and a substrate mounted above the base, comprising:
- an oscillator circuit, a heater resistor, and a temperature control circuit mounted on the substrate;
- a plurality of pins, securing the substrate above the base at a predetermined interval;
- a first metal cover, covering the oscillator circuit, the heater resistor, and the temperature control circuit;
- and
- a resin cover, mounted on the base, and the resin cover covering the first metal cover, wherein
- an air layer is formed between the first metal cover and the resin cover.
An oven controlled crystal oscillator having a base and a substrate mounted above the base, comprising:
- an oscillator circuit, a heater resistor, and a temperature control circuit mounted on the substrate;
- a plurality of pins, securing the substrate above the base at a predetermined interval;
- a first resin cover, covering the oscillator circuit, the heater resistor, and the temperature control circuit;
- and
- a metal cover, mounted on the base, the metal cover covering the first resin cover, wherein
- a first air layer is formed between the first resin cover and the metal cover,
- wherein a second air layer is formed inside the first resin cover, and the second air layer is formed between the oscillator circuit, the heater resistor, and the temperature control circuit.
Dependencies are inferred from the claim text.