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| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
| You are viewing a USPC Schedule. |
| Class 327 | MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS |
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![]() | ![]() | 1 | SPECIFIC SIGNAL DISCRIMINATING (E.G., COMPARING, SELECTING, ETC.) WITHOUT SUBSEQUENT CONTROL |
![]() | ![]() | 2 | By phase |
![]() | ![]() | 13 | By shape |
![]() | ![]() | 18 | By presence or absence pulse detection |
![]() | ![]() | 22 | By pulse noncoincidence |
![]() | ![]() | 23 | By pulse coincidence |
![]() | ![]() | 28 | By polarity |
![]() | ![]() | 31 | By pulse width or spacing |
![]() | ![]() | 32 | With shock-excited circuit |
![]() | ![]() | 33 | With sampling |
![]() | ![]() | 34 | Narrow pulse elimination or suppression |
![]() | ![]() | 35 | Separating by duration or gap (e.g., duty cycle, etc.) |
![]() | ![]() | 36 | Selection of a particular pulse width |
![]() | ![]() | 37 | Comparison by threshold or reference |
![]() | ![]() | 38 | With plural paths |
![]() | ![]() | 39 | By frequency |
![]() | ![]() | 40 | Comparison between plural inputs |
![]() | ![]() | 44 | With predetermined frequency selection |
![]() | ![]() | 47 | Frequency detection |
![]() | ![]() | 50 | By amplitude |
![]() | ![]() | 51 | With sensing amplifier |
![]() | ![]() | 58 | Maximum or minimum amplitude |
![]() | ![]() | 59 | Employing input compared to output |
![]() | ![]() | 60 | Employing input compared to reference derived therefrom |
![]() | ![]() | 61 | By diode-capacitor network |
![]() | ![]() | 62 | Maximum and minimum amplitude |
![]() | ![]() | 63 | Comparison between plural varying inputs |
![]() | ![]() | 64 | With logic or bistable circuit |
![]() | ![]() | 65 | Differential input |
![]() | ![]() | 68 | Input provides varying reference signal |
![]() | ![]() | 69 | With plural paths |
![]() | ![]() | 71 | Three or more inputs |
![]() | ![]() | 72 | Input signal compared to reference derived therefrom |
![]() | ![]() | 74 | Input signal compared to plural fixed references |
![]() | ![]() | 77 | Input signal compared to single fixed reference |
![]() | ![]() | 78 | Reference level crossover detecting |
![]() | ![]() | 80 | Reference determined by threshold of single circuit element |
![]() | ![]() | 82 | Plural sources of input signal |
![]() | ![]() | 83 | Temperature compensation |
![]() | ![]() | 84 | With bridge circuit |
![]() | ![]() | 85 | Inverting input or output |
![]() | ![]() | 86 | With transformer |
![]() | ![]() | 87 | Having feedback |
![]() | ![]() | 88 | With source as reference |
![]() | ![]() | 89 | With differential amplifier |
![]() | ![]() | 90 | Comparison between two characteristics of an input signal |
![]() | ![]() | 91 | Including details of sampling or holding |
![]() | ![]() | 97 | With logic or bistable circuit |
![]() | ![]() | 98 | By separating composite signal |
![]() | ![]() | 99 | Having selection between plural continuous waveforms |
![]() | ![]() | 100 | SIGNAL CONVERTING, SHAPING, OR GENERATING |
![]() | ![]() | 101 | Converting input current or voltage to output frequency |
![]() | ![]() | 102 | Converting input frequency to output current or voltage |
![]() | ![]() | 103 | Converting input voltage to output current or vice versa |
![]() | ![]() | 104 | Converting, per se, of an AC input to corresponding DC at an unloaded output |
![]() | ![]() | 105 | Synthesizer |
![]() | ![]() | 106 | Having stored waveform data (e.g., in ROM, etc.) |
![]() | ![]() | 107 | Having digital device (e.g., logic gate, flip-flop, etc.) |
![]() | ![]() | 108 | Current driver |
![]() | ![]() | 109 | Having semiconductive load |
![]() | ![]() | 110 | Having inductive load (e.g., coil, etc.) |
![]() | ![]() | 111 | Having capacitive load |
![]() | ![]() | 113 | Frequency or repetition rate conversion or control |