초록 ▼

A low battery detect circuit shuts down high current circuitry in the system in the event that battery voltage drops to a level such that the regulated output voltage is endangered. The trigger voltage is dependent upon capacitor ratios and a reference voltage. The output of the detection circuitry

A low battery detect circuit shuts down high current circuitry in the system in the event that battery voltage drops to a level such that the regulated output voltage is endangered. The trigger voltage is dependent upon capacitor ratios and a reference voltage. The output of the detection circuitry is a digital signal which can be used to disable high current circuitry in an implantable medical device and, thus, allow the battery voltage to recover. Alternatively, the output of the detection circuitry can be used as a battery status indicator flag.

대표청구항 ▼

Low voltage detection circuitry for detecting when a voltage signal Vbatt drops below a preselected trigger voltage Vtrig, the detection circuitry comprising: (a) a switched capacitor voltage divider that generates a ratioed voltage signal corresponding to changes in the voltage signal Vbatt; (b) co

Low voltage detection circuitry for detecting when a voltage signal Vbatt drops below a preselected trigger voltage Vtrig, the detection circuitry comprising: (a) a switched capacitor voltage divider that generates a ratioed voltage signal corresponding to changes in the voltage signal Vbatt; (b) comparator means for generating a changing output signal in response to changes in the ratioed voltage signal; and (c) means for generating a low voltage detect signal in response to a change in the comparator output signal when the ratioed voltage signal drops below the preselected trigger voltage Vtrig.