| 摘要 |
1304105 Tuning radio receivers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 April 1970 [2 May 1969] 38629/72 Divided out of 1304104 Heading H3Q The subject matter of this Specification is substantially the same as described in Fig. 1 of Specification 1,304,104 but the claim concerns a receiver tuning arrangement including bistable trigger circuits (11) and associated electronic switches (28) which apply tuning voltages to one or more electronically controllable reactances (5a, 5b, 5c) and a monostable trigger circuit (44) which is operated, when one of the bi-stable circuits (11) is operated, so as to prevent the transmission of a signal in the signal path of the receiver whilst the monostable circuit is in its operating condition. |
