Tuning system with DC-DC converter

Details Tuning system with DC-DC converter Tuning system with DC-DC converter

1995-11-14

1998-04-21

Vo, Nguyen

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551951, 4551961, H04B 118

Patent

active

057428980

ABSTRACT:
In a tuning system, a DC-DC converter DDC provides a tuning control voltage Vt for a tuner TUN. The DC-DC converter DDC is in the form of a series arrangement of an AC source CAC, an inductive element IND and a rectifier circuit REC. The AC signal provided by the AC source Vac1 is controlled by a tuning error signal Se from a tuning detector circuit TED. The inductive element IND transforms this AC signal Vac1 into an AC signal of higher amplitude Vac2. The latter AC signal Vac2 is rectified to provide the tuning control voltage Vt. In effect, the DC-DC converter DDC is part of a tuning control loop. This tuning control loop TUN, TED, DDC determines the output voltage of the DC-DC converter Vt.

REFERENCES:
patent: 4630118 (1986-12-01), Suzuki
patent: 5349700 (1994-09-01), Parker
patent: 5524288 (1996-06-01), Monge Navarro et al.

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