GB1553277A
(en )
1979-09-26
Signal compression or expansion circuits
GB2050773B
(en )
1983-10-19
Circuit for compression or expansion of an electrical signal
GB1547483A
(en )
1979-06-20
Video signal processing circuits
JPS5375813A
(en )
1978-07-05
Circuit disposition for receiving one side band of both side band signal
GB1554316A
(en )
1979-10-17
Circuit arrangements for determining zero transitions of signals
JPS5326005A
(en )
1978-03-10
Improvement of track board
JPS5466102A
(en )
1979-05-28
Circuit for mechanically recording signal
GB1538235A
(en )
1979-01-17
Train vehicle protection apparatus including signal block occupancy determination
HK68383A
(en )
1983-12-23
Signal receiver
GB1545887A
(en )
1979-05-16
Rail points system
ZA76106B
(en )
1977-08-31
Track circuit
SE397409B
(en )
1977-10-31
IN RECEIVING EQUIPMENT FOR SIGNAL CIRCUIT SIGNALS
GB1550729A
(en )
1979-08-22
Circuits for receiving an amplitude-modulated signal
IL50625A0
(en )
1976-12-31
Reference signal circuit
ZA761860B
(en )
1977-03-30
Dual frequency track circuit
GB1553273A
(en )
1979-09-26
Receiver circuits
JPS52153610A
(en )
1977-12-20
Circuit for driving signal meter of receiver
HU171917B
(en )
1978-04-28
Circuit array suitably for track circuit receiver of electronic railway block system
ZA776364B
(en )
1978-08-30
Jointless high frequency track circuit systems for railroads
JPS51135716A
(en )
1976-11-24
Electronic time recorder system
JPS5222770A
(en )
1977-02-21
Method of mounting circuit parts on circuit board
JPS52137203A
(en )
1977-11-16
Circuit for identifying audio signal
GB1558270A
(en )
1979-12-19
Signal measuring circuit
JPS5261423A
(en )
1977-05-20
Multiplex signal carrier system
JPS5262478A
(en )
1977-05-23
Time adjusting system for electronic clock