Carlos Dualibe

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A fully configurable bias current reference is described. The output of the current reference is a gate voltage which produces a desired current. For each daisy-chained bias, 32 bits of configuration are divided into 22 bits of bias current, 6 bits of active-mirror buffer current, and 4 bits of other configuration. Configuration of each bias allows(More)
— a new CMOS voltage reference, which takes advantage of the temperature dependence of NMOS and PMOS threshold voltages, is presented. Due to the circuit architecture the mobility factor is completely cancelled. It does not use resistors and all transistors works in strong inversion. The circuit is simple, opamp-less and can be implemented in a standard(More)
—Two architectures for MOS-only low power voltage references with digitally-trimmable temperature coefficient are proposed in this work. A test chip implements them in a 0.35 µm CMOS process. A design methodology for both architectures, performance figures and preliminary test results are presented. Each circuit consumes around 4 nA and operates down to(More)
The design and test of a mixed-signal 9.6Kb/s FSK transmitter-receiver is presented. It is aimed for digital communications through the domiciliary power lines as needed by a networked electrical power management and measuring system wherein the circuit must be embedded. For the desired baud rate the bit carriers frequencies of 111KHz (logical 0) and 125KHz(More)
A new low-voltage electrically tunable transconductor is presented. Its transconductance can be settled by means of a ratio between a reference current and a reference voltage rendering the circuit independent of technological parameters, to a first order approach. This property allows, to some extent, reusing the transconductor in several CMOS processes. A(More)
A straightforward technique for automatic adaptation of channels equalizers after digital data transmission is presented. Inter-Symbol Interference (ISI) at the received signal is identified by scanning the input stream over time at the data clock frequency. The resulting 2D-figure is compared against an ideal opened Eye Pattern encoded into a two-input(More)
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