Patent ID: 6208213
Filing Date: 2001-03-27
Classification: H03H,H03L

Abstract:
A thermostatically controlled quartz crystal oscillator, comprising an outer housing (1) and a circuit board (2), which board comprises:a central part (3) carrying all thermostatically controlled elements of the oscillator, including a crystal resonator in a separate casing (9) and a thermostatic regulator with heating elements (10) and a temperature detector (11), anda peripheral part separated from the central part (3) of the circuit board (2) by means of through cuts (4), both parts being connected at the ends of the cuts (4) by narrow bridging strips (5),characterised in thatthe crystal resonator in the separate casing (9) is mounted on the bottom of an inner case (6), wherein said inner caseis made of material that is an excellent heat conductor,is shaped as an inverted open box tightly adjoined by its bottom to the circuit board (2), andis supplied with heat conductive rods (8), said rods passing through the central part (3) of the circuit board (2) in close proximity to the narrow bridging strips (5), and in thatthe heating elements (10) and temperature detector (11) are mounted on the outer side walls of the inner case (6).