| 摘要 |
The invention relates to a filter circuit for electrical oscillations, consisting of switches and capacitors, using inverting and non-inverting switch-capacitor-integrators, in which the switches are controlled by four clock phases. It is the object of the invention to simulate terminating resistors for Brune sections implemented in switch-capacitor technique. This object is achieved in such a manner that the first input (3) of the non-inverting integrator (1) is connected to the output (4) of the inverting integrator (2) and the first input (5) of the inverting integrator (2) is connected to the output (6) of the non-inverting integrator (1), in that the second input (7) of the non-inverting integrator (1) is connected to the input terminal (8) of the filter and the output (4) of the inverting integrator (2) is connected to the first output terminal (9) of the filter, in that the second input (10) is connected to the output (4) of the inverting integrator (2) and the output (6) of the non-inverting integrator (1) is connected to the second output terminal (12) of the filter, and in that an input signal (-U1) is transmitted inverted from the input (8, 8') to the first output (9, 8') and non-inverted to the second output (12, 8'), and in that, furthermore, the clock phases ( theta 1 to theta 4) are suitably selected. <IMAGE>
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