Abstract:
The invention relates to a device for measuring an electrical characteristic of a substrate comprising a support made of a dielectric material having a bearing surface, the support comprising an electrical test structure having a contact surface flush with the bearing surface of the support, the bearing surface of the support and the contact surface of the electrical structure being suitable for coming into close contact with a substrate. The measurement device also comprises at least one connection bump contact formed on another surface of the support and electrically linked to the electrical structure. The invention relates also to a system for characterizing a substrate and a method for measuring a characteristic of a substrate employing the measurement device.
Abstract:
Apparatus are provided for use in testing circuit boards. A signal sensing device includes one or more probes. Each probe includes a length of rigid coaxial conductor configured to define a sensing pin at one end. A circuit board defines a number of through vias lined in metal and configured to receive the sensing pin of a corresponding probe. The signal sensing device also includes a ground pin. Electrical pathways extending away from adjacent pairs of the through vias can be tested for electrical impedance and other signal propagating characteristics by way of the signal sensing device.
Abstract:
The present invention discloses an integrated circuit (200) including a module (130) for processing a radio-frequency (RF) signal during normal operation of the integrated circuit. The IC (200) has an on-chip test arrangement for generating an accurate RF test signal for testing the module (130) in a test mode. To this end, the test arrangement comprises a signal source (210) for generating a radio-frequency control signal in the test mode and a complementary transistor pair (230) arranged in series, said pair being coupled between a first supply rail and a second supply rail, and being arranged to generate the radio-frequency test signal on its output in response to the radio- frequency control signal supplied to its control terminals. The invention is based on the realization that if a stable enough supply voltage is provided to the transistor pair, the pair can be forced to produce an accurate rail-to-rail voltage swing at RF frequencies on its output. This output signal can be used to test the RF module (130) with high accuracy, thus obviating the need to use expensive external test equipment.
Abstract:
Die Erfindung betrifft ein kontaktloses Messsystem mit wenigstens einer Messspitze (28), die einen Teil einer Koppelstruktur zum kontaktlosen Auskoppeln eines auf einem Signal-Wellenleiter (26) laufenden Signals ausbildet, wobei der Signal-Wellenleiter (26) als Leiterbahn und als Teil einer elektrischen Schaltung (52) auf einer Schaltungsplatine (24) der elektrischen Schaltung ausgebildet ist. Hierbei ist auf der Schaltungsplatine (24) wenigstens eine Kontaktstruktur (18; 44) derart ausgebildet und angeordnet, dass diese Kontaktstruktur (18; 44) von dem Signal-Wellenleiter (26) galvanisch getrennt ist, einen Teil der Koppelstruktur ausbildet, vollständig im Nahfeld des Signal-Wellenleiters (26) angeordnet und wenigstens einen Kontaktpunkt (42) aufweist, der von einem Kontakt einer Messspitze (28) elektrisch kontaktierbar ist.
Abstract:
An analysis circuit for analysing the RF response of an RF circuit, comprises a voltage controlled oscillator (12), wherein a signal derived from voltage controlled oscillator output is applied as input to the RF circuit (10). A first mixer (18) mixes the RF circuit output with a first mixer signal derived from the voltage controlled oscillator and a second mixer (20) mixes the RF circuit unit output with a second mixer signal derived from the voltage controlled oscillator, the first and second mixer signals being 90 degrees out of phase. The mixer output signals are processed to provide the analysis. This analysis circuit uses mixers to enable baseband digital signal processing of signals to enable a frequency response characteristic of the RF circuit to be obtained. The analysis circuit essentially operates in the manner of an IF demodulator circuit.
Abstract:
Die Erfindung betrifft ein Testverfahren für eine Vielzahl von RFID-Interposern zur Überprüfung ihrer Funktionsfähigkeit mittels einer Testeinrichtung (9a - 9c, 10, 12), wobei jeder Interposer mindestens einen RFID-Chip (6) und mindestens zwei mit dem RFID-Chip (6) verbundene, vergrößerte Anschlussflächen (7a, 7b), die auf einem Interposer-Substrat (8) angeordnet sind, umfasst, wobei zwischen der Testeinrichtung (9a - 9c, 10, 12) und mindestens einem der Interposer eine kapazitive Kopplung zur Übertragung von Daten aufgebaut wird. Es wird eine Testvorrichtung wiedergegeben.
Abstract:
An RF ID tag is capable of reporting receiver signal strength indication, wherein the receiver signal strength may be indicated by an a RSSI byte included with an electronic product code (EPC) data packet. The EPC data packet may be in the standard SGTIN-64 EPC data format. Further, the RF ID tag capable of reporting signal strength may enable power control or beam steerin .