By Gordon W. Roberts
Analog sign iteration for Built-In-Self-Test (BIST) of Mixed-Signal built-in Circuits is a concise creation to a robust new sign iteration procedure.
The booklet starts with a short advent to the checking out challenge and a overview of traditional sign new release recommendations. The ebook then describes an oversampling-based oscillator in a position to producing high-precision analog tones utilizing a mixture of electronic good judgment and D/A conversion. those ideas are then prolonged to multi-tone checking out schemes with out introducing a critical penalty. The ideas are prolonged extra to surround piece-wise linear waveforms corresponding to sq., triangular and sawtooth waves. Experimental effects are offered to ensure the information in each one bankruptcy and at last, conclusions are drawn. For these readers surprising with delta-sigma modulation recommendations, a short creation to this topic can also be supplied in an appendix.
The booklet is perfect for try engineers, researchers and circuits designers with an curiosity in IC checking out tools.
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Additional info for Analog signal generation for built-in-self-test of mixed-signal integrated circuits
8 we show a dipole array seen edge-on under three different load conditions. The element lengths are ∼λ/2. In the case to the left the terminals are open-circuited. Thus, looking into the antenna terminals we observe a reﬂection coefﬁcient = +1 as also shown in the Smith chart underneath the array. However, we can also consider such a structure as a frequency selective surface. When exposed to an incident plane wave the reﬂection coefﬁcient FSS ∼ 0. (From this viewpoint we have assumed here that the total scattering from λ/4 segments is negligible compared to that from λ/2 dipoles.
It should be noted that no parametric study was done on the resistive values of the loads at this point. More in Chapter 4. We also show in Fig. 5c a case where each element over the entire surface has been loaded very lightly, namely with 20 ohms. We observe a strong reduction of the ripples from column to column—in particular, in the right half of the array. The transmission loss at resonance due to the 20-ohm load resistors is obtained from the equivalent circuit in Fig. 6b. 9, or about 1 dB (just barely permissible).
Bottom: An array of dipoles with an oversized groundplane. Pat scat is obtained from the receiving or scattering currents. And since the two current distributions are similar in this case (for element length ∼λ/2 or shorter), we may conclude that Pat tr ∼ Pat scat . 15) Note: For the receiving pattern Pat rec we always have from the law of reciprocity Pat rec ≡ Pat tr in spite of the fact that the current distributions in the two cases in general are different. ON TRANSMITTING, RECEIVING, AND SCATTERING RADIATION PATTERN OF FINITE ARRAYS 33 Based on this observation many assume that the scattering pattern is in general almost the same as the transmitting (or receiving) pattern.