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| Number | Title | Issue Date |
| 7002322 | Modulated power supply A modulated power supply comprises first and second coding units. The second coding unit is responsive to a feed-forward error signal representing the error between the coded output of the first coding unit and an input modulating signal. The second coding unit code... | 02/21/2006 |
| 4135590 | Noise suppressor system A noise suppressor system uses a set of parallel bandpass filters to transform an input signal into a plurality of spectral adjacent band signals. Each band signal may then be substantially attenuated (squelched) by an attenuation-control circuit when it ... | 01/23/1979 |
| 4055813 | Single adjustment multiple function calibration circuit A single adjustable control is commonly connected with each of a plurality of feedback channels, which are selectively coupled in an amplifier circuit to provide the latter with different basic gains, to adjust the respective basic gains of the amplifier ... | 10/25/1977 |
| 4054844 | Amplifying system An amplifying system comprises an amplifier having a certain constant gain, a first variable attenuator through which an input signal for this system is inputted to the amplifier, and a second variable attenuator through which the output signal of the amp... | 10/18/1977 |
