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| Number | Title | Issue Date |
| 7405613 | Differential slope demodulator for low-IF frequencies A circuit and method for differential slope demodulator circuit are shown that utilize amplitude stabilizing of a frequency modulated signal to obtain an amplitude stabilized signal. Also shown is bandpass filtering of the amplitude stabilized signal for a first fre... | 07/29/2008 |
| 6951149 | Output shaft locking device for multi-clutch transmission and locking method of same An output shaft locking device for a multi-clutch transmission in which a plurality of rotational mechanisms, each of which is formed by arranging a clutch and a shifting mechanism is series, is provided in parallel between a rotational power input shaft and a rotat... | 10/04/2005 |
| 6573782 | Sigma delta FM ratio detector A circuit (100) for generating a ratio signal indicating a ratio of frequency error to signal magnitude of an input signal includes an FM ratio detector (110) and a sigma-delta analog-to-digital converter (130). The FM ratio detector (110) is responsive t... | 06/03/2003 |
| 4562404 | FM Demodulator with selective phase shift circuits The disclosure is directed to an improved FM demodulating circuit which is simple in circuit construction, with a small number of parts required, and so arranged that in a quadrature detecting circuit, a plurality of piezoelectric resonators, for example,... | 12/31/1985 |
| 4499605 | FM-Receiver using a ratio detector with silicon diodes An FM-receiver having an FM-channel successively comprising an RF-input stage and mixer stage (B), an IF-circuit (A) and a ratio detector (R). The ratio detector incorporates silicon detector diodes and a smoothing capacitor conductively connected to the ... | 02/12/1985 |
| 4254378 | Modified Foster-Seeley frequency discriminator In a Foster-Seeley discriminator circuit having a discriminating resonance circuit, resonance circuits having series resonance characteristics are respectively connected between a signal source and both ends of the discriminating resonance circuit so as t... | 03/03/1981 |
| 4225975 | Noise suppression circuit for use with FM receiver Two semiconductor diodes are serially interconnected across a ratio detector in the same polarity. When the detected output from the ratio detector reaches a predetermined magnitude, both diodes are conducting and the detected output is taken from the jun... | 09/30/1980 |
| 4207535 | Two-pole, fixed-tuned monolithic crystal frequency discriminator A two-pole fixed-tuned monolithic crystal frequency discriminator circuit is provided wherein a tuned circuit is utilized connected between the center pin of the two-pole crystal device and ground. In this manner, two bandpass filters are effectively prov... | 06/10/1980 |
| 4150338 | Frequency discriminators An input signal comprising a carrier wave whose frequency may vary is applied to two complementary conductivity type transistors. Two resonant circuits, one tuned to a frequency slightly higher than and the other tuned to a frequency slightly lower than t... | 04/17/1979 |
| 4087757 | Constant delay resonant tank circuit combination for frequency discrimination The method of designing a circuit having a substantially constant delay over a given frequency band and having a substantially linear attenuation characteristic or amplitude change characteristic over the same frequency band and the product resulting from... | 05/02/1978 |
| 4027268 | Demodulator for PM or FM signals A demodulator for demodulating a phase modulated (PM) or frequency modulated (FM) signal into a baseband signal includes detector arrangement for converting said PM or FM signal into two outputs, means for summing the two outputs and means for modifying t... | 05/31/1977 |
| 4001702 | High speed FM and AM demodulator A high speed arrangement for simultaneously demodulating the AM and FM information coming in on a tone frequency carrier. In the case of the incoming tone signal being only FM modulated, the FM demodulator extracts the data whereas the AM demodulator prov... | 01/04/1977 |
| 3987367 | Surface wave discriminator system The invention relates to surface wave discriminator systems comprising a substrate on the surface of which are arranged two electromechanical filters each incorporating two delay lines of dissimilar delay length. The amplitudes of the alternating voltages... | 10/19/1976 |
| 3936764 | Frequency discriminator utilizing surface wave devices A frequency discriminator utilizing a pair of surface wave devices each comprising one transducer on a piezoelectric substrate connected in series with a signal source and a pair of envelope detectors connected in series with the surface wave devices is s... | 02/03/1976 |
| 3934207 | Frequency discriminator utilizing surface wave devices Frequency discriminators utilizing a pair of surface wave devices each comprising one transducer on a piezoelectric substrate connected in parallel with a signal source and a pair of envelope detectors connected in parallel with the surface wave devices a... | 01/20/1976 |
