Frequency to voltage converter for cardiac communication system

摘要: An accurate frequency to voltage converter for cardiac telemetry systems, in which charges are stored response selected intervals proportional the period of an alternating input signal. Linearization output as a function characteristic is effectively and inexpensively achieved by charging set holding capacitors from substantially constant through resistance such that capacitor terminal rises exponential time. The reciprocal has similarly shaped curve, these characteristics combined invention generate desired linear overall conversion function. Additionally, controlled switching means employed alternately establishing pair signal path conditions, this definite internal ON prevents complete discharge time allowed. To alleviate inaccuracy would accordingly otherwise result, additional connected directly periodically discharges capacitors.