Tuning circuit, patchboard and tuning circuit internal equipment for tuning circuit

摘要

Topic Offer the tuning circuit which can miniaturize the multiple tuner departments which are internalized to tuning circuit internal equipment such as television receiver as the whole.SolutionsAs for tuner department 3 of the tuning circuit 1A of this device, the high tension generation circuit 4 which generates the tuning voltage which is supplied to the entry terminal of the 1st PLL circuit 3a and, branching from the entry terminal of the 1st PLL circuit 3a, it has with the output terminal 3b outside 1st it outputs the tuning voltage which can. Because of that, the tuning voltage which generates by the high tension generation circuit 4 through the output terminal 3b outside 1st, it is possible to supply to the PLL circuit of the 2nd tuner department 5 which is not jointed to the high tension generation circuit 4. Because of this, it is possible to contribute to the space saving of 2nd tuner department 5. Choice figure Drawing 1