High frequency regenerative direct detector

• US 20030139158A1
• Filed: 01/18/2002
• Published: 07/24/2003
• Est. Priority Date: 01/18/2002
• Status: Active Grant

• Current Assignee: K-Vet Limited
• Original Assignee: K-Vet Limited
• Inventors: Kan, Iu Peng
• Granted Patent: US 6,703,927 B2
• Time in Patent Office: Days
• US Class Current: 455/214
• CPC Class Codes: H03D 11/08 by means of semiconductor devices having more than two electrodes
• CPC Class Codes: H04B 1/202 by remote control

Abstract

A high frequency super regenerative direct detector includes a power supply and a signal detecting circuit arrangement electrically connected thereto. The signal detecting circuit arrangement, which is a transistor control system, includes a high frequency by-pass circuit, a LC tank circuit configured to be tuned at a pre-tuned frequency and to receive an incoming signal so as to generate an oscillator frequency, ranging from 800 MHz to 960 MHz, a quenching circuit coupling with the high frequency by-pass circuit to generate a quenching frequency, and a transistor circuit device configured to incorporate the oscillator frequency into the quenching frequency in such a manner that when the incoming signal matches the pre-tuned frequency a timing to achieve a saturated level of the quenching frequency is faster than no signal period, and a modulation frequency of the incoming signal is detected out from the signal detecting circuit arrangement.

Claims

1. A regenerative direct detector, comprising:

a power supply; and

a signal detecting circuit arrangement electrically connected with said power supply, wherein said signal detecting circuit arrangement comprises a high frequency bypass circuit, a LC tank circuit configured to be tuned at a pre-tuned frequency to receive an incoming signal and to generate an oscillator frequency, from 850 MHz to 960 MHz, a quenching circuit generating a quenching frequency, and a transistor circuit device configured to incorporate said oscillator frequency into said quenching frequency in such a manner that when said incoming signal matches said pre-tuned frequency, a timing to achieve a saturated level of said quenching frequency is faster than no signal period, and a modulation frequency of said incoming signal is detected out from said signal detecting circuit arrangement.

2. A regenerative direct detector, as recited in claim 1, wherein said LC tank circuit comprises a LC coil inductor functioning as an antenna to receive said incoming signal and a LC variable capacitor tuned to said pre-tuned frequency at least 900 MHz, wherein a LC resistor is electrically coupling with said LC tank circuit and configured to provide a wider bandwidth of said oscillator frequency for reliable reception.

3. A regenerative direct detector, as recited in claim 1, wherein said quenching circuit comprises a quenching coil inductor, a quenching capacitor, and a quenching resistor electrically coupling together to generate said quenching frequency which has a value not more than 2 MHz.

4. A regenerative direct detector, as recited in claim 2, wherein said quenching circuit comprises a quenching coil inductor, a quenching capacitor, and a quenching resistor electrically coupling together to generate said quenching frequency which has a value not more than 2 MHz.

5. A regenerative direct detector, as recited in claim 2, wherein said transistor circuit device comprises a super high frequency NPN transistor configured for radio frequency amplifier, mixer, and audio band signal detector against said incoming signal.

6. A regenerative direct detector, as recited in claim 3, wherein said transistor circuit device comprises a super high frequency NPN transistor configured for radio frequency amplifier, mixer and audio band signal detector against said incoming signal.

7. A regenerative direct detector, as recited in claim 4, wherein said transistor circuit device comprises a super high frequency NPN transistor configured for radio frequency amplifier, mixer, and audio band signal detector against said incoming signal.

8. A regenerative direct detector, as recited in claim 2, wherein said signal detecting circuit further comprises a stabilizer circuit comprising a stabilizer and at least a stabilizer diode to provide a stable self-bias to a bias of said transistor circuit device to obtain a stable operation of said quenching circuit and said transistor circuit device

9. A regenerative direct detector, as recited in claim 4, wherein said signal detecting circuit further comprises a stabilizer circuit comprising a stabilizer and at least a stabilizer diode to provide a stable self-bias to a bias of said transistor circuit device to obtain a stable operation of said quenching circuit and said transistor circuit device.

10. A regenerative direct detector, as recited in claim 7, wherein said signal detecting circuit further comprises a stabilizer circuit comprising a stabilizer and at least a stabilizer diode to provide a stable self-bias to a bias of said transistor circuit device to obtain a stable operation of said quenching circuit and said transistor circuit device.

11. A regenerative direct detector, as recited in claim 2, further comprising a signal amplifying circuit arrangement, which is an amplifier stage of said incoming signal, comprising an amplifying operation amplifier for amplifying said modulation frequency with a predetermined ratio so as to tune said modulation frequency to a higher level audio output signal.

12. A regenerative direct detector, as recited in claim 4, further comprising a signal amplifying circuit arrangement, which is an amplifier stage of said incoming signal, comprising an amplifying operation amplifier for amplifying said modulation frequency with a predetermined ratio so as to tune said modulation frequency to a higher level audio output signal.

13. A regenerative direct detector, as recited in claim 7, further comprising a signal amplifying circuit arrangement, which is an amplifier stage of said incoming signal, comprising an amplifying operation amplifier for amplifying said modulation frequency with a predetermined ratio so as to tune said modulation frequency to a higher level audio output signal.

14. A regenerative direct detector, as recited in claim 10, further comprising a signal amplifying circuit arrangement, which is an amplifier stage of said incoming signal, comprising an amplifying operation amplifier for amplifying said modulation frequency with a predetermined ratio so as to tune said modulation frequency to a higher level audio output signal.

15. A regenerative direct detector, as recited in claim 12, further comprising an audio output circuit arrangement coupling with said signal amplifying circuit arrangement wherein said audio output circuit arrangement comprises an output operation amplifier working as a voltage comparator and a refinement circuit to perform an comparator level refinement so that said audio output signal outputted from said amplifying operation amplifier of said signal amplifying circuit arrangement is shaped to a pulse form at said output operation amplifier.

16. A regenerative direct detector, as recited in claim 13, further comprising an audio output circuit arrangement coupling with said signal amplifying circuit arrangement wherein said audio output circuit arrangement comprises an output operation amplifier working as a voltage comparator and a refinement circuit to perform an comparator level refinement so that said audio output signal outputted from said amplifying operation amplifier of said signal amplifying circuit arrangement is shaped to a pulse form at said output operation amplifier.

17. A regenerative direct detector, as recited in claim 14, further comprising an audio output circuit arrangement coupling with said signal amplifying circuit arrangement wherein said audio output circuit arrangement comprises an output operation amplifier working as a voltage comparator and a refinement circuit to perform an comparator level refinement so that said audio output signal outputted from said amplifying operation amplifier of said signal amplifying circuit arrangement is shaped to a pulse form at said output operation amplifier.

18. A regenerative direct detector, as recited in claim 12, further comprising an audio output circuit arrangement coupling with said signal amplifying circuit arrangement wherein said audio output circuit arrangement comprises an output resistor, a volume control, at least an output capacitors, and a power amplifier, wherein said audio output circuit arrangement is arranged to amplify said audio output signal outputted from said amplifying operation amplifier of said signal amplifying circuit arrangement through said output capacitor, said output resistor, and said volume control by said power amplifier, so as to shape said audio output signal into a wave form.

19. A regenerative direct detector, as recited in claim 13, further comprising an audio output circuit arrangement coupling with said signal amplifying circuit arrangement wherein said audio output circuit arrangement comprises an output resistor, a volume control, at least an output capacitors, and a power amplifier, wherein said audio output circuit arrangement is arranged to amplify said audio output signal outputted from said amplifying operation amplifier of said signal amplifying circuit arrangement through said output capacitor, said output resistor, and said volume control by said power amplifier, so as to shape said audio output signal into a wave form.

20. A regenerative direct detector, as recited in claim 14, further comprising an audio output circuit arrangement coupling with said signal amplifying circuit arrangement wherein said audio output circuit arrangement comprises an output resistor, a volume control, at least an output capacitors, and a power amplifier, wherein said audio output circuit arrangement is arranged to amplify said audio output signal outputted from said amplifying operation amplifier of said signal amplifying circuit arrangement through said output capacitor, said output resistor, and said volume control by said power amplifier, so as to shape said audio output signal into a wave form.