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| Number | Title | Issue Date |
| 7394874 | Up/down conversion circuitry for radio transceiver A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified ... | 07/01/2008 |
| 7194044 | Up/down conversion circuitry for radio transceiver A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified ... | 03/20/2007 |
| 6356599 | AFC device and method of controlling reception frequency in a dual-mode terminal An AFC (Automatic Frequency Control) device and a method of controlling reception frequency in a dual-mode terminal. When a dual-mode terminal uses one or two AFC devices, the time required for acquiring tracking synchronization in a PLL circuit for a fir... | 03/12/2002 |
| 5751197 | Low-power, self-quenching superregenerative detector A low-power, self-quenching superregenerative receiver utilizes a single-port SAW device coupled to an RF oscillator to establish the frequency of oscillation at the output of the RF oscillator. A diode detector is coupled from the oscillator output for d... | 05/12/1998 |
| 5603111 | Synchronous tracking AM receiver An improved synchronous tracking AM receiver having low power requirements and a small size. The synchronous tracking AM receiver provides signal tracking capability and sensitivity approaching a conventional superhetrodyne receiver. The synchronous track... | 02/11/1997 |
| 5241687 | Phase controlling phase of local subcarrier signal to correspond to transmitted pilot signal Apparatus for demodulating information signals frequency-modulated on an RF carrier signal carrying spectral components within the audio frequency range, a pilot carrier signal having an imparted phase shift from the phase of the transmitted pilot carrier... | 08/31/1993 |
| 5105162 | Electrically tuned RF receiver, apparatus and method therefor An electrically tuned super-regenerative receiver (10) comprises a feedback type oscillator having a signal output and a signal input, phase shift components (30) connected in a feedback loop for coupling the signal output to the signal input to cause osc... | 04/14/1992 |
| 4143324 | Transistorized superregenerative radio frequency detector A transistorized superregenerative radio frequency detector which utilizes neither biasing circuits nor a base decoupling capacitor is described herein. The detector is nevertheless self-quenching and operates at a much higher quenching frequency than is ... | 03/06/1979 |
