TWI456176B - Time-domain temperature sensing system with a digital output and method thereof - Google Patents

Claims (10)

A time domain temperature sensing system with digital output, comprising: a cyclic delay line comprising a plurality of logic elements; a path selection circuit coupled to the cyclic delay line; and a counter connected to the path Selecting a circuit; wherein the cycle temperature is first subjected to temperature-time pulse conversion using the cyclic delay line to generate a temperature-dependent time pulse width signal, and the cycle delay line measurement is repeated after the circuit is selected through the path The temperature-dependent time pulse width signal is digitally converted by the counter after the path selection circuit to generate a temperature logarithmic output signal. The time domain temperature sensing system with digital output according to claim 1 of the patent application, wherein the cyclic delay line comprises a plurality of reverse gates, the reverse gates being connected in series to form a delay gate based delay line. The time domain temperature sensing system with digital output according to claim 1 of the patent application, wherein the cyclic delay line further comprises a pulse reducing component. The time domain temperature sensing system with digital output according to claim 1 of the patent application, wherein the path selection circuit comprises a first multiplexer, a second multiplexer and a D-type flip-flop. The time domain temperature sensing system with digital output according to claim 1 of the patent application scope, wherein the time domain temperature sensing system with digital output further comprises a mutual exclusion or gate. A time domain temperature sensing method with digital output, comprising: connecting a cyclic delay line to a path selection circuit; using the cyclic delay line to perform temperature-time pulse conversion on a temperature to be measured to generate a temperature Corresponding time pulse width signal; connecting a counter to the path selection circuit; and repeating the cyclic delay line to measure the temperature-related time pulse width signal through the path selection circuit, and selecting the circuit via the path The counter is used for digital conversion to generate a temperature log output signal. The time domain temperature sensing method with digital output according to claim 6 of the patent application scope, wherein the cyclic delay line comprises a plurality of reverse gates, and the reverse gates are connected in series to form a reverse gate based delay line. The time domain temperature sensing method with digital output according to claim 6 of the patent application scope, wherein the cyclic delay line further comprises a pulse reducing component. The time domain temperature sensing method with digital output according to claim 6 of the patent application scope, wherein the path selection circuit comprises a first multiplexer, a second multiplexer and a D-type flip-flop. The time domain temperature sensing method with digital output according to item 6 of the patent application scope, wherein the time domain temperature sensing method with digital output additionally adopts a mutual exclusion or gate.