Abstract:
The solution according to the invention consisting in conversion of a time interval to a digital word of a number of bits equal to n by the use of the array (A) of binary-scaled capacitors (C.n-1, . . . , C0) is characterized in that the time interval whose both start and end are detected by the control module (CM) is first mapped to a portion of electric charge delivered by the current source (I) and successively accumulated in the capacitors ((Cn-1, . . . , C0)) in the order of decreasing capacitances starting from the capacitor (Cn-1) having the highest capacitance value in the array, and when the control module (CM) detects the end of the time interval, the charge accumulated in the capacitor (Cx) charged recently is successively transferred by the use of the current source (I) to the capacitors of lower capacitance values. The process of charge transfer is controlled by the control module (CM) on the basis of the output signals of the comparators (K1) and (K2) without the use of a clock while the value one is assigned to these bits (bn-1, . . . , b0) in the digital output word that correspond to the capacitors (Cn-1, . . . , C0) on which the reference voltage (UL) of a desired value has been obtained, and the value zero is assigned to the other bits.
Abstract:
The solution according to the invention consisting in conversion of a time interval to a digital word of a number of bits equal to n by the use of the array (A) of binary-scaled capacitors (Cn-1, . . . , C0) is characterized in that the time interval whose both start and end are detected by the control module (CM) is first mapped to a portion of electric charge delivered by the current source (I) and successively accumulated in the capacitors ((Cn-1, . . . , C0)) in the order of decreasing capacitances starting from the capacitor (Cn-1) having the highest capacitance value in the array, and when the control module (CM) detects the end of the time interval, the charge accumulated in the capacitor (Cx) charged recently is successively transferred by the use of the current source (I) to the capacitors of lower capacitance values. The process of charge transfer is controlled by the control module (CM) on the basis of the output signals of the comparators (K1) and (K2) without the use of a clock while the value one is assigned to these bits (bn-1, . . . , b0) in the digital output word that correspond to the capacitors (Cn-1, . . . , C0) on which the reference voltage (UL) of a desired value has been obtained, and the value zero is assigned to the other bits.
Abstract:
Method and apparatus for mapping the converted voltage value by electric charge value proportional to the converted voltage value and in accumulation of charge in the sampling capacitor until the voltage on this capacitor is equal to the converted voltage. Furthermore, realization of the process of that electric charge redistribution in the array of redistribution by changes of states of signals from relevant control outputs and in assignment of relevant values to bits in the digital word by means of the control module. As soon as accumulation of electric charge in the sampling capacitor is terminated, electric charge is accumulated in the additional sampling capacitor then the process of that electric charge redistribution is realized and relevant values are assigned to bits of the digital word. When a trigger signal is detected, next cycle begins and electric charge is accumulated in the sampling capacitor.
Abstract:
A conversion module contains an asynchronous analog-to-digital converter (AADC) with the output signal generated at irregular time intervals, whose output is connected to the input of the buffer memory module (BUF), and the output of the buffer memory module (BUF) is connected through the internal bus (BUS) simultaneously to the source address module (SADR), to the configuration registers module (REG), to the control module of the interface (CM), which the reference generator (RG) is connected to, and to the destination address module (DADR), to the selection register module (SELREG), to the transmitter/receiver module (SDM), and moreover the control inputs/outputs (1, 2, . . . , 8) of the control module (CM) are connected respectively to the asynchronous analog-to-digital converter (AADC), to the buffer memory module (BUF), to the source address module (SADR), to the configuration registers module (REG), to the destination address module (DADR), to the selection register module (SELREG), to the transmitter/receiver module (SDM), and to the clock control module (SCM), and on the other hand, the transmitter/receiver module (SDM) output is connected through the controller (SDD) to the data line (SDA) of the I2C bus whose clock line (SCL) is connected through the other controller (SCD) to the clock control module (SCD) output, and what is more the write control output (9) of the asynchronous analog-to-digital converter (AADC) is connected to the write control input (10) of the buffer memory module (BUF).
Abstract:
The method includes the accumulation of electric charge in the sampling capacitor (Cn) by parallel connection of the sampling capacitor (Cn) to the source of converted voltage (UIN) and in realization of the process of charge redistribution in the array of redistribution (A) by changing states of signals from relevant control outputs and in assignment of relevant values to bits in the digital word by means of the control module (CM). After detection of the beginning of the next trigger signal (Px+1), the charge is accumulated in the additional sampling capacitor (CnA), and then the process of charge redistribution is realized and relevant values are assigned to bits of the digital word. The apparatus includes an array of redistribution (A), the section of the sampling capacitor (An), the control module (CM), two comparators (K1 and K2) and the current source (J) connected in a known way.
Abstract:
The solution according to the invention consisting in conversion of a voltage value to a digital word of a number of bits equal to n is characterized in that the converted voltage value is first mapped to a portion of electric charge accumulated in the sampling capacitor (C-n) during the active state of the signal on the trigger input (InS) and the accumulated charge portion is next successively redistributed by the use of the current source (I) in the array (A) of binary-scaled capacitors (Cn-1, . . . , C0) in the order of decreasing capacitances starting from the capacitor (Cn-1) having the highest capacitance value in the array (A). The process of charge redistribution is controlled by the control module (CM) on the basis of the output signals of the comparators (K1) and (K2) without the use of a clock while the value one is assigned to these bits (bn-1, . . . , b0) in the digital output word that correspond to the capacitors (Cn-1, . . . , C0) on which the reference voltage (UL) of a desired value has been obtained, and the value zero is assigned to the other bits.
Abstract:
Method and apparatus for accumulation of electric charge delivered to the charge input (InQ) in the sampling capacitor (Cn) and in realization of the process of charge redistribution in the array of redistribution (A) by changing states of signals from relevant control outputs and in assignment of relevant values to bits in the digital word by means of the control module (CM). Method is characterized in that after detection of the beginning of the next gate signal (Gx+1), the charge is accumulated in the additional sampling capacitor (CnA), and then the process of charge redistribution is realized and relevant values are assigned to bits of the digital word. When the beginning of the subsequent gate signal (Gx+2) is detected, the next cycle begins and electric charge is accumulated in the sampling capacitor (Cn) again.
Abstract:
The solution according to the invention consisting in conversion of a portion of electric charge to a digital word of a number of bits equal to n by the use of successive redistribution of charge in the array (A) of binary-scaled capacitors (Cn-1, . . . , Co) is characterized in that charge is first accumulated during the active state of the external gate signal on the gate signal input (InG) in the capacitors (Cn-1, . . . , Co) in the order of decreasing capacitances starting from the capacitor (Cn-1) having the highest capacitance value in the array, and when the active state of the gate signal is terminated, the charge accumulated in the capacitor (Cx) charged recently is successively transferred by the use of the current source (I) to the capacitors of lower capacitance values. The process of charge transfer is controlled by the control module (CM) on the basis of the output signals of the comparators (K1) and (K2) without the use of a clock while the value one is assigned to these bits (bn-1, . . . , b0) in the digital output word that correspond to the capacitors (Cn-1, . . . , Co) on which the reference voltage (UL) of a desired value has been obtained, and the value zero is assigned to the other bits.
Abstract:
The solution according to the invention consisting in the modulation of the analog signal using the asynchronous Sigma-Delta modulator, counting periods of the reference clock during each pulse of the previously obtained square wave and making the digital word available is characterized in that the square wave (z(t)) obtained in result of the modulation in the asynchronous Sigma-Delta modulator (ASDM) is subjected to conversion by counting the periods (T0) of the reference clock (RG) during subsequent pulses of that square wave (z(t)) by means of the counting module (CTM), and then each word obtained representing the number of periods (T0) of the reference clock (RG) counted during each given pulse of the square wave (z(t)) is recorded and stored in the intermediate buffer (TBUF); and the duration of the serial transmission of the digital word obtained in result of counting the periods of the reference clock (RG) during previous pulse of the square wave (z(t)) is simultaneously controlled by the control module (CM); and as soon as this transmission is completed, the content of the intermediate buffer (TBUF) is transferred to the transmitting buffer (TDR) of the apparatus; and after that a given digital word representing a given pulse of the squarewave (z(t)) is transmitted serially to the computer or to the communication network; then the cycle is repeated for the next pulse of the square wave (z(t)).
Abstract:
The solution according to the invention consisting in conversion of a portion of electric charge to a digital word of a number of bits equal to n by the use of successive redistribution of charge in the array (A) of binary-scaled capacitors (Cn-1, . . . , Co) is characterized in that charge is first accumulated during the active state of the external gate signal on the gate signal input (InG) in the capacitors (Cn-1, . . . , Co) in the order of decreasing capacitances starting from the capacitor (Cn-1) having the highest capacitance value in the array, and when the active state of the gate signal is terminated, the charge accumulated in the capacitor (Cx) charged recently is successively transferred by the use of the current source (I) to the capacitors of lower capacitance values. The process of charge transfer is controlled by the control module (CM) on the basis of the output signals of the comparators (K1) and (K2) without the use of a clock while the value one is assigned to these bits (bn-1, . . . , b0) in the digital output word that correspond to the capacitors (Cn-1, . . . , Co) on which the reference voltage (UL) of a desired value has been obtained, and the value zero is assigned to the other bits.