TH19039B - Signal amplifier - Google Patents

Abstract

Improvement of digital switching amplifiers Has been revealed here With the use of a low-pass filter located at the inlet of the switching comparator. To help improve the ratio to noise at the final exit As for other characteristics Of this invention It also consists of the use of propagation delay in order to make the oscillation of the amplifier circuit more stable.

Claims (3)

1.Pulse width modulation cycle consists of A comparator whose outlet oscillates between the first pressure levels. And two corresponding to the polar condition of the pressure difference During the entrance does not reverse the polarity. And the entrance to the terminal of the comparator Where the inlet to the polarity of the comparator will be connected to the outlet of the comparator through the feedback resistor, earthed through the capacitor. And connected to the input signal through the input of the resistor Where the non-inverting entrance of the comparator is maintained at a constant potential. A method for providing sufficient propagation delay in that way would consist of a comparator. And feedback resistor This causes the capacitor to charge a certain time after the change in the polarity of the voltage difference between the inverting entrance. And the entrance does not compare The voltage of the capacitor is in a triangular waveform which is acted upon in the exit of the comparator, there is a square waveform at the frequency determined by the capacitor value. Feedback resistor And the first and second voltage levels and where the inlet signal applies to the reverse polarity of the comparator. Thus, the exit of the comparator is the pulse width modulated by the input signal 2. The modulation circuit, as defined in claim 1, also consists of a low pass filter that addresses Between capacitors And the reverse polarity of the comparator for use for converting with a pressure waveform. 3. The modulation circuit as defined in claim 2, where the low-pass filter consists of a resistor. And the capacitor connected to it during the reverse polarity of the comparator and to ground 4. The modulation circuit as defined in claim 1, where the propagation delay pathway. It consists of a total pass filter network. 5. The modulation cycle, as defined in claim 1, also consists of the first low-pass filter. Located at the exit of the comparator for signal reversal The entrance from the pulse width modulated to the signal. Comparator solution The circuit is then switched to a switching amplifier. 6. The modulation circuit as defined in claim 5 also consists of a second low pass filter. That is in between capacitors And the reverse polarity entrance of the comparator to convert the triangular capacitor's voltage waveform Into the form of sinusoidal movement. To improve the signal-to-noise ratio of the amplifier. 7. The modulation cycle, as set out in claim 5, where the propagation delay pathway. It consists of a total pass filter network. 8. Modulation cycle as defined in claim 5, where propagation delay pathways Contains the states of the other amplifiers between the exit of the comparator and the anti-reverse resistor. Comparator with reverse entrance And not inverting the polarity with the exit of the comparator connected to the inverse of the comparator through the feedback suppressor. And the reverse polarity of the comparator is connected to the input signal through Resistor inlet The capacitor is connected to the reverse polarity of the comparator and is earthed. The outlet of the comparator will oscillate between the first pressure level. And corresponds to the polarity of the pressure difference during the non-inverting inlet And the reverse polarity of the comparator Where the inversion inlet of the comparator is connected to the outlet. Of the comparator through the feedback resistor, earthed through the capacitor And connected to the input signal through the input of the resistor The first resistor is connected to the comparator non-inverting inlet and is grounded. Second resistor connected to the exit of the comparator to the non-inverting entrance of the comparator, the first suppressor. And the two will make up the voltage divider. To feed back a portion of the exit of the comparator to the non-inverting entrance. So that after the change in the exit of the comparator to the inverse of the inversion So that after the change in the outlet of the comparator, the capacitor will charge up to the voltage across the first resistor. Before the exit of the comparator changes Where the voltage of the capacitors is in a triangle wave. The first low pass filter is used to reverse the comparator inlet signal and the second low pass filter in between the capacitors. And the reverse polarity of the comparator To convert the triangular capacitor's voltage waveform into a sinusoidal transponder, in order to improve the amplifier signal-to-noise ratio, 1 0. Amplifiers as defined in the claim 9 where the second low pass filter Contains resistors And the capacitor is connected to the reverse polarity of the comparator and is connected to earth 1. 1. Circuit as defined in claim 6, where the second low-pass filter Contains resistors And the capacitor is connected between the reverse polarity of the comparator and earthed 1 2. The cycle as set out in claim 6, where propagation delay pathways Contains a total of 1 pass filters 3. The circuit, as defined in claim 6, where the propagation delay path consists of the states of the other amplifiers during the comparator exit. And feedback resistor