Abstract:
In order to demodulate an amplitude-modulated signal, two capacitors (C1, C2) are provided to which a signal rectified by a diode (D1) and having a voltage (U1) can be fed. The half-waves of this signal are used by a switch (S3) for alternately charging the first or second capacitor. The capacitors (C1, C2) are discharged by the switches (S1, S2). A comparison of the amplitude values, stored in the capacitors (C1, C2), of the successive half-waves which is carried out in an evaluation unit (AE) enables the execution of a simple and precise demodulation, which can be implemented using few components and at very high frequencies.
Abstract:
The invention relates to a circuit arrangement for demodulating a voltage which is (ASK)-modulated by the change of amplitude between a low and a high level. On a first and a second charging circuit one charging voltage (V1, V2) each is generated, and a decoupling device (S1) decouples the first charging circuit (C1, i1) at a predetermined ratio between the charging voltage (V2) of the second charging circuit (C2, i2) and an input voltage (UHF) of the rectifier circuit (D1, D2).
Abstract:
An integrated memory contains two normal read amplifiers and two first redundant read amplifiers. It also contains bit lines which are combined into at least two individually addressable normal columns, at least one of which from each normal column is connected to one of the normal read amplifiers. It also has first redundant bit lines which are combined into one individually addressable redundant column, at least one of which is connected to one of the redundant read amplifiers. The first redundant read amplifier and its redundant columns are provided for replacing the two normal read amplifiers and one of the normal columns.
Abstract:
The invention provides a circuit configuration for demodulating a voltage that is ASK modulated by altering the amplitude between a low level and a high level. In this case, a first and a second charging circuit each produce a charging voltage and decoupling device decouples the first charging circuit when there is a prescribed ratio between the charging voltage of the second charging circuit and an input voltage for the rectifier circuit.
Abstract:
A decoder element is provided with an output, whereby an output signal with one of three different possible potentials is produced. The output signal may have a value of either a first potential, a second potential, and a third potential, where the second potential lies between the first potential and the third potential. The output signal is produced according to voltage values of input signals at terminal connections of the decoder element.
Abstract:
The invention provides a circuit configuration for demodulating a voltage that is ASK modulated by altering the amplitude between a low level and a high level. In this case, a first and a second charging circuit each produce a charging voltage and decoupling device decouples the first charging circuit when there is a prescribed ratio between the charging voltage of the second charging circuit and an input voltage for the rectifier circuit.
Abstract:
A voltage is (ASK)-modulated by a change in amplitude between a low and high level. On a first and second charging circuit one charging voltage is generated for each. A decoupling device decouples the first charging circuit with a predetermined ratio between the charging voltage of the second charging circuit and an input voltage for a rectifier circuit.