摘要:
The present invention represents a technique to reduce the readout time of switched capacitor array (SCA) circuitries. A possible implementation is a SCA chip capable of sampling 12 differential input channels at a sampling speed of 10 MSPS to 5 GSPS. The analog waveform can be stored in 1024 sampling cells per channel, and can be read out after sampling via a shift register clocked at 33 MHz for external digitization. The write signal for the sampling cells is generated by a chain of inverters (domino principle) generated on the chip. The domino wave is running continuously until stopped by a trigger. A read shift register clocks the contents of the sampling cells either to a multiplexed or to individual outputs, where it can be digitized with an external ADC. It is possible to read out only a part of the waveform for reducing the digitization time. The high channel density, high analog bandwidth of 450 MHz, and low noise of 0.35 mV (after offset calibration) makes this chip ideally suited for low power, high speed, high precision waveform digitizing. Fabricated on an advanced CMOS process in a radiation hard design, the present chip is available in a 64-lead low profile quad flat pack (LQFP) and a 64-pin quad flat non-leaded package (QFN).
摘要:
A shift register is configured so that each of first and second intermediate stages includes (i) a first input terminal supplied with a clock signal, (ii) a second input terminal supplied with a clock signal different in phase from the clock signal supplied to the first input terminal, (iii) an output terminal connected to the first input terminal via an output transistor, and (iv) a setting circuit, which is connected to the second input terminal and the output transistor, for setting an electric potential of a control terminal of the output transistor, the second intermediate stage includes a control circuit which is (i) connected to the setting circuit of the second intermediate stage and (ii) supplied with a control signal, an operation period (i) starts at a time when a shift start signal supplied to an initial stage is activated and (ii) ends at a time when an output of a final stage changes from activation to inactivation, and when the clock signal supplied to the first input terminal of the second intermediate stage is initially activated after the operation period starts, the clock signal supplied to the second input terminal of the second intermediate stage is inactive.
摘要:
The present invention represents a technique to reduce the readout time of switched capacitor array (SCA) circuitries. A possible implementation is a SCA chip capable of sampling 12 differential input channels at a sampling speed of 10 MSPS to 5 GSPS. The analog waveform can be stored in 1024 sampling cells per channel, and can be read out after sampling via a shift register clocked at 33 MHz for external digitization. The write signal for the sampling cells is generated by a chain of inverters (domino principle) generated on the chip. The domino wave is running continuously until stopped by a trigger. A read shift register clocks the contents of the sampling cells either to a multiplexed or to individual outputs, where it can be digitized with an external ADC. It is possible to read out only a part of the waveform for reducing the digitization time. The high channel density, high analog bandwidth of 450 MHz, and low noise of 0.35 mV (after offset calibration) makes this chip ideally suited for low power, high speed, high precision waveform digitizing. Fabricated on an advanced CMOS process in a radiation hard design, the present chip is available in a 64-lead low profile quad flat pack (LQFP) and a 64-pin quad flat non-leaded package (QFN).
摘要:
An analog sampler (1) for continuous recording and read-out of analog data carried by a bus (5) comprises an array (10) of recording cells (2) arranged in L rows (13) and C columns (12). Each cell (2) has an analog input (3) coupled to the write bus (5) and an analog output (103) coupled to a read bus (4) through commutation means (21, 25) having respectively a control digital input (23, 26). The cells of a column are recorded sequentially, whereas the cells of another column already recorded are read-out simultaneously. A constant number of columns separates the write column from the read column. The system is looped so that writing and read-out go on indefinitely in a continuous way.
摘要:
A switching circuit comprising a means for holding a signal or a DC component thereof, and a switching transistor for driving the holding means, wherein another means is included for shaping the trailing edge to be more obtuse in the fall of a driving pulse applied to a gate of the switching transistor. There is also disclosed a charge transfer device comprising a charge transferrer for transferring a signal charge, a charge-voltage converter for converting the transferred signal charge into a proportional voltage, and a driver for supplying a reset pulse to the charge-voltage converter so as to reset the capacitance thereof to a predetermined potential, wherein another a means is incorporated in the driver for shaping the trailing edge to be more obtuse in the fall of the reset pulse. Since the trailing edge of the reset pulse at the time of turning off the reset is rendered more obtuse, it becomes possible to reduce the coupling portion of the output waveform where the potential of a floating diffusion or a floating gate is varied by the capacitive coupling which is derived from the parasitic capacitance between a reset drain and a reset gate.
摘要:
Die Erfindung bezieht sich auf eine Verzögerungsschaltung mit wenigstens zwei Speicherzellen (3,4,5,6,8,9), welche je ein kapazitives Speicherelement (20,26,40,45), einen Schreibtransistor (22,28,42,47), mittels dessen eine zu verzögernde Information aus einer Schreibleitung (18) in das kapazitive Speicherelement (20,26,40,45) einschreibbar ist, und einen Lesetransistor (21,27,41,46) aufweisen, mittels dessen eine Information aus dem kapazitiven Speicherelement (20,26,40,45) auf eine Leseleitung (19) auslesbar ist, und mit einer mittels eines ersten Steuertaktes getakteten Steueranordnung, welcher eingangsseitig ein Steuersignal zugeführt wird und welche miteinander gekoppelte Steuerschaltungen (11,12,13,14,15,16) aufweist, von denen jeweils eine je einer Speicherzelle (3,4,5,6,8,9) zugeordnet ist, wobei mittels des Eingangssignals jeder Steuerschaltung (11,12,13,14,15,16) der Lesetransistor (21,27,41,46) der zugeordneten Speicherzelle (3,4,5,6,8,9) und mittels des Ausgangssignals jeder Steuerschaltung (11,12,13,14,15,16) der Schreibtransistor (22,28,42,47) der zugeordneten Speicherzelle ansteuerbar ist, wobei jede Steuerschaltung (11,12,13,14,15,16) ein erstes (43,48,24,30) und ein diesem nachgeschaltetes zweites (44,49,25,31) Steuerelement aufweist, diejenigen Steuerschaltungen (14) ein drittes, dem ersten Steuerelement (30) vorgeschaltetes Steuerelement (29) aufweisen, deren vorgeschaltete Steuerschaltung (11) örtlich entfernt angeordnet ist, daß den dritten Steuerelementen (29) eingangsseitig das Ausgangssignal des ersten Steuerelementes (24) der jeweils vorgeschalteten, räumlich entfernt angeordneten Steuerschaltung (11) zugeführt wird, und daß die ersten Steuerelemente (43,48,24,30) der Steuerschaltungen (11,12,13,14,15,16) von dem ersten Takt und die zweiten (44,49,25,31) und dritten (29) Steuerelemente der Steuerschaltungen (11,12,13,14,15,16) von einem zweiten Takt getaktet werden.