In this paper we present a systematic top-down methodology for designing power-limited and matching-limited circuits with a help of IP database. the presented methodology is a helpful tool for the circuit performance ...
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ISBN:
(纸本)9781424422760
In this paper we present a systematic top-down methodology for designing power-limited and matching-limited circuits with a help of IP database. the presented methodology is a helpful tool for the circuit performance optimization and for the design time shortening. the approach is illustrated on a design of a measuring channel front-end, which senses an external high-voltage signal. the circuit is a signal conditioning front-end for an A/D converter input where the critical design parameters are the power consumption, the matching and the transient response and last but not least the design time. the circuit was implemented in an ASIC and manufactured in 0.35 mu m high-voltage CMOS technology.
this paper presents a novel technique for gate-level design of combinatorial logic as weakly indicating function blocks. the input state space associated with a function block expands exponentially with a gradual incr...
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ISBN:
(纸本)9781424422760
this paper presents a novel technique for gate-level design of combinatorial logic as weakly indicating function blocks. the input state space associated with a function block expands exponentially with a gradual increase in the number of inputs. As a result, large area overhead would incur for an asynchronous realization. Hence, a novel design methodology for realizing combinational logic as a function block is developed under the discipline of quasi-delay-insensitivity with four-phase handshaking and dual-rail encoding, whilst trying to mitigate the area overhead. the focus is on design adhering to the weakly indicating timing regime. Based on analysis with some combinational benchmarks and widely used logic circuit functionality, the proposed method is found to enable compact realizations and appears to be promising for weakly indicating function block design comprising many inputs and outputs.
the gain reduction of nanometer-size MOS transistors due to the high output conductance of the devices is already discussed in the literature. this paper discusses an additional issue which leads to further gain reduc...
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ISBN:
(纸本)9781424422760
the gain reduction of nanometer-size MOS transistors due to the high output conductance of the devices is already discussed in the literature. this paper discusses an additional issue which leads to further gain reduction - the gate-leakage current. On the basis of the example of a regulated cascode in 130nm CMOS and in 65nm CMOS it is estimated that this shrinking step decreases the gain due to gate-leakage current by about 30 to 40dB.
this paper presents an analysis of an influence of global parametric faults (GPF) on analogue integrated circuits (AIC) time domain (TD) response features, such as overshoot, delay time, rise time, maxima and minima, ...
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ISBN:
(纸本)9781424422760
this paper presents an analysis of an influence of global parametric faults (GPF) on analogue integrated circuits (AIC) time domain (TD) response features, such as overshoot, delay time, rise time, maxima and minima, first differential maxima and minima. the novel approach is the analysis of relations and superrelations between features which are discussed in details. the presented results should increase testability and diagnosability of the global parametric faults on a production line of analogue and mixed electroniccircuits. the recently observed AIC faults belong to parametric ones and are caused by technological process. GPF influence on aforementioned features is presented withthe use of an exemplary circuit. A research presented in this paper may be used as an introduction to a Fault Driven Test (FDT) diagnosis withthe use of Simulation Before Test (SBT) methods.
An experimental analog design for parametric test methods efficiency evaluation is presented. the circuit is implemented in a standard 0.35 mu m CMOS process by AMS. the circuit under test (CUT) is a two-stage operati...
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ISBN:
(纸本)9781424422760
An experimental analog design for parametric test methods efficiency evaluation is presented. the circuit is implemented in a standard 0.35 mu m CMOS process by AMS. the circuit under test (CUT) is a two-stage operational amplifier with implemented addressable faults. the control of the overall circuit is ensured by a 7-bit shift register. For higher loading capability a buffer is connected to the output. To preserve the possibility of voltage ramping, the CUT has a separated supply rail. the CUT can be also connected to a feedback network integrated on the chip, and thus, turned into an oscillator.
this paper examines three different flip-flop designs in subthreshold operation. All flip-flops are simulated in a 65 nm and 90 nm process with a supply voltage ranging from 125 mV to 1 V. Process variations are exami...
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ISBN:
(纸本)9781424422760
this paper examines three different flip-flop designs in subthreshold operation. All flip-flops are simulated in a 65 nm and 90 nm process with a supply voltage ranging from 125 mV to 1 V. Process variations are examined at different process corners. Successful operations of a PowerPC 603 flip-flop at all process corners with a supply voltage down to 125 mV is shown at 65 nm. the best PDP and EDP numbers of flip-flops design at V-DD = 200 mV in this paper are 53.6 aJ and 0.88 yJs, respectively.
A highly linear down-conversion mixer in a 65nm digital CMOS technology is presented. the mixer was fabricated in a tripple-well process which allows to use the bulk of NMOS transistors as inputs. In contrary to other...
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ISBN:
(纸本)9781424422760
A highly linear down-conversion mixer in a 65nm digital CMOS technology is presented. the mixer was fabricated in a tripple-well process which allows to use the bulk of NMOS transistors as inputs. In contrary to other works not the gate but the bulk connector is used for the input signal. A high IIP3 of +18dBm was achieved with a power consumption of only 0.67mW from a 1.2V supply voltage. the mixer has a measured 1dB compression point of +7dBm. the input signal bandwidth lies beyond 2GHz.
this paper presents an architectural framework and simulation model for tile-based runtime reconfigurable systems. the framework accounts for all hardware limitations of actual FPGA devices and is based on the divisio...
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ISBN:
(纸本)9781424422760
this paper presents an architectural framework and simulation model for tile-based runtime reconfigurable systems. the framework accounts for all hardware limitations of actual FPGA devices and is based on the division of the reconfigurable system partition into a set of small tiles. these tiles can either be exchanged individually at runtime or can be grouped to larger tiles and be exchanged as a whole. the adaptive tile size allows the realization of hardware modules of varying sizes. For easing the system design process a SystemC simulation methodology at a high abstraction level is presented which provides support for all architectural features of the hardware framework. In particular, the capability of simulating runtime reconfigurable systems is supported by the simulation methodology without modifying the SystemC kernel. the applicability of the architectural framework and of the simulation model is demonstrated by means of an example.
this paper describes rules to transform Verilog HDL source code in order to propagate X-values on RTL models in a more realistic way, and to check for potential differences of RTL simulation results against expected s...
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ISBN:
(纸本)9781424422760
this paper describes rules to transform Verilog HDL source code in order to propagate X-values on RTL models in a more realistic way, and to check for potential differences of RTL simulation results against expected silicon implementation behavior. By running X-propagation simulations in parallel to usual RTL simulation and debugging, RTL design bugs previously detected in gate-level simulations can be detected earlier now. A prototypical tool automatically implements the proposed transformation rules. Experimental results on two industrial hardware designs validate the usefulness of our approach and justify its application in everyday use.
Motivated by the fact that no existing common mode feedback block (CMFB) can work for the systems characterized with both high output impedance and large output swing, a new CMFB topology is introduced in this paper t...
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ISBN:
(纸本)9781424422760
Motivated by the fact that no existing common mode feedback block (CMFB) can work for the systems characterized with both high output impedance and large output swing, a new CMFB topology is introduced in this paper to accomplish this task. Various types of CMFB are studied, analyzed and simulated. Compared with other CMFBs, the proposed CMFB obtains the widest linear input range, smallest output common-mode level error, largest (full) output swing and has no interference to the system output impedance. All these properties entitle the presented CMFB circuit to suit all types of fully differential systems, especially for systems which require both high output impedance and large signal output swing.
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