摘要:
Schaltungsanordnung zur Steuerung des Stromflusses (I L ) durch eine Last (R L ) bei Erfassung des Stromflusses (I L ) nach dem Strom-Sense-Prinzip. Die Schaltungsanordnung besitzt ein erstes Transistorpaar (P1) aus einem ersten Last- und Hilfstransistor (T11, T21), die einen gemeinsamen Steueranschluß (G1) und jeweils einen ersten Laststreckenanschluß (S) aufweisen, wobei die Last (R L ) an den ersten Laststreckenanschluß (S) des ersten Lasttransistors (T11) angeschlossen ist. Eine Meßanordnung (MA) ist über eine erste Eingangsklemme (EK1) an den ersten Laststreckenanschluß (S) des ersten Lasttransistors (T11) und über eine zweite Eingangsklemme (EK2) an den ersten Laststreckenanschluß (S) des ersten Hilfstransistors (T21) angeschlossen und weist eine Ausgangsklemme (AK) auf, an der ein Stromflußsignal (U A ) abgreifbar ist. Dem ersten Lasttransistor (T11) ist wenigstens ein weiterer Lasttransistor (T12, T1n) parallel geschaltet, der über einen weiteren Steueranschluß (G2, Gn) abhängig von dem durch die Last fließenden Strom (I L ) ansteuerbar ist.
摘要:
A signal conditioner (34) for use with cardiographic data and other biological signals includes a baseline shift circuit (42) and a variable gain amplifier (44). A feedback loop is provided for the output signal with a reference which designates the maximum value of the output signal. Within the baseline shifting circuit (42), there is provided circuitry which compares the amount of offset of the negative excursions of the waveform from a reference lead so as to introduce a feedback compensation signal which shifts the baseline and thereby compensates for drift in the baseline. Integration circuitry (50) in the form of counters of clock pulses are provided in the control of both amplifier gain and baseline shift. Timing circuitry (60) provides forthe interleaving of set-up intervals with data aquisition intervals, the gain adjustment and baseline adjustment being accomplished only during the set-up intervals. Sensing of temporal data by waveform analysis (58) is utilized for restarting the timing sequence (60) whenever the format of the sensed biological signal falls outside of the predetermined limits.
摘要:
A signal conditioner (34) for use with cardiographic data and other biological signals includes a baseline shift circuit (42) and a variable gain amplifier (44). A feedback loop is provided for the output signal with a reference which designates the maximum value of the output signal. Within the baseline shifting circuit (42), there is provided circuitry which compares the amount of offset of the negative excursions of the waveform from a reference lead so as to introduce a feedback compensation signal which shifts the baseline and thereby compensates for drift in the baseline. Integration circuitry (50) in the form of counters of clock pulses are provided in the control of both amplifier gain and baseline shift. Timing circuitry (60) provides forthe interleaving of set-up intervals with data aquisition intervals, the gain adjustment and baseline adjustment being accomplished only during the set-up intervals. Sensing of temporal data by waveform analysis (58) is utilized for restarting the timing sequence (60) whenever the format of the sensed biological signal falls outside of the predetermined limits.
摘要:
Apparatus for compensating the injurious increase ofthe cathode current occurring during the initial operation period of a travelling-wave tube when, during successive warming-up, the grid first approaches the cathode and then assumes the nominal distance therefrom. The apparatus includes a distance control device measuring the deviation between the actual grid-cathode distance and the nominal distance and generating a control signal proportional to the deviation for reducing the value of the grid voltage.