Signal generator including high and low frequency oscillators

DETAILED DESCRIPTION According to the present invention, a signal generator having a high frequency quartz oscillator with reduced current consumption includes a circuit containing a low frequency quartz oscillator, means to produce a correction signal used for controlling a programmable frequency divider and an electronic switch for the periodic switching of the high frequency quartz oscillator.
In a preferred embodiment of the present invention, the means for producing the correction signal includes a beat frequency generator and, by using a low frequency oscillator with low current consumption and by periodically switching on the high frequency quartz oscillator, a high frequency quartz resonator may be used which has a frequency higher than those used hitherto, such as 8.
38 MHz, which, with reference to temperature behaviour and volume, is more desirable than a quartz resonator at a frequency of 4.
19 MHz, in the case of quartz crystals having a cut/section in accordance with U.
S.
Pat.
No.
4,071,797.