Resonator having a selection circuit for selecting a resonance mode

Resonator provided with a resonating device and with a selection circuit for selecting a resonance mode. The selection circuit is formed by a first-order oscillator which is provided with a synchronization input and whose output is connected to the excitation input of the resonating device, the output of the resonating device being connected to the synchronization input of the first-order oscillator in order to synchronize said oscillator and the output signal of the resonator being derived from the resonating device or oscillatorElectrical Engineering, Mathematics and Computer Scienc

Demodulator for frequency modulation signal comprises oscillator connection to which signal is fed at predetermined location for phase-locking of connection

The demodulator for a frequency modulation signal comprises an oscillator connection to which the signal is fed at a predetermined location for phase-locking of the connection. The demodulator comprises a dynamic memory component (11), which supplies a first output signal (Vuit 1), first and second comparison components (12,13) which compare the first output signal with a first and a second reference signal (Eh,E1). A discrete memory component (14) is connected with the output signals of the first and second comparison output signals for storage of a second output signal (V uit 2). The second output signal has a value equal to one of a number of values and is dependent upon the values of the output signals of the first and second comparison signals. An input of the dynamic memory component is connected with the second output signal.; The first and/or second reference signals are/is dependent upon the frequency modulation signal (V in 1; V in 2). The discrete memory component is a set-reset signal bufferApplied Science

Quadrature modulator and demodulator

Quadrature demodulator (10) and quadrature modulator (30) which comprise a first oscillator (11) and a second oscillator (12), a separate excitation signal being fed to the first osciallator (11) and second oscillator (12) in order to determine the point in time at which switching between two stable states takes place, and the quadrature demodulator (10) and quadrature modulator (30) further comprise excitation means (17, 18).Electrical Engineering, Mathematics and Computer Scienc