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Class Information
Number: 327/113
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Signal converting, shaping, or generating > Frequency or repetition rate conversion or control
Description: Subject matter wherein a frequency characteristic of an input signal is modified to produce an output wave of different frequency characteristic which has a definite relationship to that of the input wave or where a frequency characteristic is held essentially constant.










Sub-classes under this class:

Class Number Class Name Patents
327/117 Frequency division 490
327/119 Frequency multiplication (e.g., harmonic generation, etc.) 269
327/114 Of output rectangular waveform 234


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
4472785 Sampling frequency converter Sep. 18, 1984
4470025 Method and circuitry for chirped oscillator automatic frequency control Sep. 4, 1984
4468638 Linear sweep frequency modulator for FM/CW radio altimeter Aug. 28, 1984
4461999 Circuit for producing a periodic sawtooth shaped signal Jul. 24, 1984
4461022 Expandable bandwidth compression and restoration system Jul. 17, 1984
4450532 Voltage to frequency converter May. 22, 1984
4437066 Apparatus for synthesizing a signal by producing samples of such signal at a rate less than the Nyquist sampling rate Mar. 13, 1984
4435750 Rectified AC frequency converter Mar. 6, 1984
4418318 Digital phase-locked loop circuit Nov. 29, 1983
4417218 Linearizing circuit for a high frequency voltage controlled oscillator Nov. 22, 1983
4413239 Field effect transistor circuit for modulator and demodulator applications Nov. 1, 1983
4404531 Frequency scanning apparatus wherein a single knob controls both step size and direction of change Sep. 13, 1983
4403156 Frequency conversion circuit Sep. 6, 1983
4393314 Circuit arrangement for the generation of a sawtooth voltage Jul. 12, 1983
4379238 Integrated signal processing circuit Apr. 5, 1983
4373189 Signal conversion device Feb. 8, 1983
4363007 Noise reduction system having series connected low and high frequency emphasis and de-emphasis filters Dec. 7, 1982
4360788 Phase-locked loop frequency synthesizer Nov. 23, 1982
4359690 Microwave storage device Nov. 16, 1982
4354412 Adaptive metronome for an automatic rhythm generator Oct. 19, 1982
4340864 Frequency control system Jul. 20, 1982
4338528 Optimization circuit for a serrodyne frequency translator Jul. 6, 1982
4320527 Bit synchronizing system for pulse signal transmission Mar. 16, 1982
4320531 Time shared frequency conversion system Mar. 16, 1982
4317209 FSK Tone generator circuit Feb. 23, 1982
4317230 Broad-band passive ring mixer Feb. 23, 1982
4308473 Polyphase coded mixer Dec. 29, 1981
4305041 Time compensated clock oscillator Dec. 8, 1981
4295189 Apparatus and method for generating waveforms which are particularly suitable for a PWM-driven motor Oct. 13, 1981
4293825 Frequency-shifting systems for frequency modulated signals Oct. 6, 1981
4288750 Surface acoustic wave time chirp devices Sep. 8, 1981
4270061 Current transformer input system for AC conversion devices May. 26, 1981
4268916 Frequency converting circuit May. 19, 1981
4247890 Reversible inverter system having improved control scheme Jan. 27, 1981
4247822 Frequency translation means Jan. 27, 1981
4242639 Digital phase lock circuit Dec. 30, 1980
4234929 Control device for a phase lock loop vernier frequency synthesizer Nov. 18, 1980
4234966 Double balanced diode mixer with d.c. response Nov. 18, 1980
4230956 Doubly balanced mixer with optimized dynamic range Oct. 28, 1980
4216431 Integrated circuit for frequency conversion Aug. 5, 1980
4197506 Programmable delay line oscillator Apr. 8, 1980
4166249 Digital frequency-lock circuit Aug. 28, 1979
4165539 Bidirectional serial-parallel-serial charge-coupled device Aug. 21, 1979
4147973 Frequency dependent amplitude modulated translator apparatus Apr. 3, 1979
4143387 Signal mixer including resistive and normal gate field-effect transistor Mar. 6, 1979
4136288 Frequency translation circuits Jan. 23, 1979
4134074 Dynamic transient response filter Jan. 9, 1979
4129832 Method and means for linearizing a voltage controlled oscillator sweep generator Dec. 12, 1978
4121164 Automatic trigger circuit Oct. 17, 1978
4112382 Digital sweep circuit for generating sawtooth wave form Sep. 5, 1978

1 2 3 4 5 6 7 8 9 10 11 12










 
 
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