Television tuner module having a shielded housing mounted on an outer circuit board and having an inner circuit board with a tuner chip
View Patent ↗Described systems and methods allow the manufacture of compact television (TV) tuner modules comparable in size to standard RF connectors. In some embodiments, a compact TV tuner module (tuner can) includes a metallic housing mounted on an external printed circuit board (PCB), a radio-frequency (RF) connector, an internal PCB within the housing, and a bare-silicon TV tuner chip centrally mounted on a side of the internal PCB facing away from the RF connector, directly opposite a central contact made directly a central pin of the RF connector and a central area of the internal PCB. A major dimension of a shielded internal volume enclosed by the housing is less than 150% of an outer shell of the RF connector, and may be about equal to or slightly larger than the diameter of the RF connector.
1. A television tuner module configured to be mounted on an external printed circuit board (PCB), the tuner module comprising:
a coaxial radio frequency (RF) connector including a conductive tubular outer shell and a central signal pin centered within the tubular outer shell;
a metallic television tuner module housing connected to the RF connector and configured to be mounted on the external PCB, the tuner module housing having a shielded internal volume, wherein a major dimension of the shielded internal volume in a plane perpendicular to the central signal pin is less than 120% of a diameter of the outer shell of the RF connector;
an internal printed circuit board (PCB) mounted within the tuner module housing, the internal PCB being perpendicular to the central signal pin, the internal PCB having a central PCB contact situated in a center of a first, connector-facing side of the internal PCB, wherein the central signal pin contact is directly connected to the central PCB contact;
a television tuner chip centrally mounted on a second side of the internal PCB facing away from the RF connector; and
a set of PCB interconnection pins generally perpendicular to the internal PCB, the set of PCB interconnection pins being electrically connected to the internal PCB, for electrically connecting the internal PCB to the external PCB.
2. The television tuner module of claim 1 , wherein the television tuner chip is a bare chip, and wherein the television tuner module further comprises an insulating planar support adhered on one side to the second side of the internal PCB and on an opposite side to a semiconductor surface of the television tuner chip.
3. The television tuner module of claim 1 , wherein the tuner module housing comprises a plurality of bent-in metal flaps supporting the internal PCB.
4. The television tuner module of claim 1 , wherein the tuner chip is electrically connected to a crystal oscillator mounted on the external PCB within the shielded internal volume, for receiving a crystal oscillator output signal.
5. The television tuner module of claim 1 , wherein the diameter of the outer shell has a value between 11 mm and 12 mm, and the major dimension of the shielded internal volume has a value of less than 17 mm.
6. The television tuner module of claim 5 , wherein the major dimension of the shielded internal volume has a value of less than 12 mm.
7. The television tuner module of claim 1 , wherein the major dimension of the shielded internal volume in the plane perpendicular to the central signal pin is not larger than the diameter of the outer shell of the RF connector.
8. The television tuner module of claim 1 , wherein the major dimension of the shielded internal volume in the plane perpendicular to the central signal pin is no larger than the diameter of the outer shell of the RF connector.
9. The television tuner module of claim 1 , wherein the television tuner chip is mounted on the internal PCB with an active side of the television tuner chip facing and in direct electrical contact with a conductor of the internal PCB.
10. The television tuner module of claim 1 , further comprising a plurality of flexible conductive leads extending from the internal PCB to a major face of the television tuner chip facing away from the RF connector, for electrically connecting the television tuner chip to the internal PCB.
11. A television tuner module configured to be mounted on an external printed circuit board (PCB), the tuner module comprising:
a coaxial radio frequency (RF) connector including a conductive tubular outer shell and a central signal pin centered within the tubular outer shell;
a metallic television tuner module housing connected to the RF connector and configured to be mounted on the external PCB, the tuner module housing having a shielded internal volume, wherein a major dimension of the shielded internal volume in a plane perpendicular to the central signal pin is less than 120% of a diameter of the outer shell of the RF connector;
an internal printed circuit board (PCB) mounted within the tuner module housing, the internal PCB being parallel to the central signal pin, the internal PCB having a PCB contact situated on a first side of the internal PCB, wherein the central signal pin contact is directly connected to the central PCB contact;
a television tuner chip centrally mounted on a second side of the internal PCB opposite the first side of the internal PCB; and
a set of PCB interconnection pins generally perpendicular to the internal PCB, the set of PCB interconnection pins being electrically connected to the internal PCB, for electrically connecting the internal PCB to the external PCB.
12. The television tuner module of claim 11 , wherein the television tuner chip is a bare chip, and wherein the television tuner module further comprises an insulating planar support adhered on one side to the second side of the internal PCB and on an opposite side to a semiconductor surface of the television tuner chip.
13. The television tuner module of claim 11 , wherein the tuner module housing comprises a plurality of bent-in metal flaps supporting the internal PCB.
14. The television tuner module of claim 11 , wherein the tuner chip is electrically connected to a crystal oscillator mounted on the external PCB within the shielded internal volume, for receiving a crystal oscillator output signal.
15. The television tuner module of claim 11 , wherein the diameter of the outer shell has a value between 11 mm and 12 mm, and the major dimension of the shielded internal volume has a value of less than 17 mm.
16. The television tuner module of claim 15 , wherein the major dimension of the shielded internal volume has a value of less than 12 mm.
17. The television tuner module of claim 11 , wherein the major dimension of the shielded internal volume in the plane perpendicular to the central signal pin is not larger than the diameter of the outer shell of the RF connector.
18. The television tuner module of claim 11 , wherein the major dimension of the shielded internal volume in the plane perpendicular to the central signal pin is no larger than the diameter of the outer shell of the RF connector.
19. The television tuner module of claim 11 , wherein the television tuner chip is mounted on the internal PCB with an active side of the television tuner chip facing and in diect electrical contact with a conductor of the internal PCB.
20. The television tuner module of claim 11 , further comprising a plurality of flexible conductive leads extending from the internal PCB to a major face of the television tuner chip facing away from internal PCB, for electrically connecting the television tuner chip to the internal PCB.