摘要:
An automatic vending machine for vending information, containing: a receiving unit (1,51,53) for receiving a signal carrying first information transmitted from a satellite; a storage unit (2,55) for storing the first information; a buying request input unit (3, 57) for receiving a request for buying the information; a charge receiving unit (4) for receiving a charge for the first information; and an information output unit (5, 56) for reading the first information requested by the request from the storage unit (2,55) and outputting the first information when the request and the charge is received.
摘要:
A variable level converter comprises a first variable level converting unit (110), a second variable level converting unit (120) and a grounded-emitter amplifying transistor (13) connected between them. Each of the first and second variable level converting units is comprised of an inverted L-type variable attenuator which includes a series resistor (111,121) and a variable impedance element (112,122). The second variable level converting unit includes the collector resistor (13) of the transistor circuit. Each variable impedance element is controlled by the same level control signal (Sc) and has the same electric characteristics.
摘要:
An automatic vending machine for vending information, containing: a receiving unit (1,51,53) for receiving a signal carrying first information transmitted from a satellite; a storage unit (2,55) for storing the first information; a buying request input unit (3, 57) for receiving a request for buying the information; a charge receiving unit (4) for receiving a charge for the first information; and an information output unit (5, 56) for reading the first information requested by the request from the storage unit (2,55) and outputting the first information when the request and the charge is received.