Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP2020031272
Kind Code:
A
Abstract:
To provide a semiconductor device capable of transmitting data used for different control without increasing a signal path.SOLUTION: A pulse generation circuit 6 of a transmission side chip 2 outputs a low-frequency pulse train as a signal INH when a signal IN inputted from the exterior indicates a high level, and outputs a frequency pulse train as a signal INL when the signal IN indicates a low level. When a signal DATAIN is at a high level, the signals INH and INL are changed to have a higher frequency and then modulated. A reception side chip 4 receives the signals INH and INL via a transformer chip 3 as signals OUTH and OUTL, and a latch circuit 5 is controlled by these signals to output a signal OUT to the exterior. A pulse frequency determination circuit 10 demodulates the signals OUTH and OUTL depending on a change in frequency to output a signal DATAOUT to the exterior.SELECTED DRAWING: Figure 1
Inventors:
HASEGAWA JUNICHI
Application Number:
JP2018154015A
Publication Date:
February 27, 2020
Filing Date:
August 20, 2018
Export Citation:
Assignee:
DENSO CORP
International Classes:
H03K17/689; H03K7/06; H03K7/08; H03K7/10; H03K9/06; H03K9/08; H03K9/10
Attorney, Agent or Firm:
Patent Business Corporation Sato International Patent Office