摘要:
An oscillator operated with an external power source or an external save power source (Ves), comprises: a clock signal generation unit for generating and outputting a clock signal; a power-on detection unit (5) for detecting the power-on of the external power source; a power-off detection unit (6) for detecting the power-off of the external power source; a running time count unit (4) for counting the running time from the time a power-on detection signal is input to the time a power-off detection signal is input; storage means (9) for storing an accumulated running time up to the power-on time of the external power source; and a control unit (8) for reading the running time at the time of the power-off detection signal being input, reading the accumulated running time from the storage means (9), adding the running time to the accumulated running time, and storing the addition result as a new accumulated running time in the storage means (9).
摘要:
An oscillator with a noise reduction function is provided that can arbitrarily change the setting of a spread spectrum modulation and easily reduce the noise of electronic equipment, a writing device that can change the setting of the oscillator, and a control method of the writing device. The oscillator (10) has a memory (80) that stores modulation data (DM) for performing the spread spectrum modulation input from an output terminal (fout), a modulation signal output circuit (60) that generates a modulation signal (SM) from the modulation data (DM) stored in the memory (80), and a mixer (53) that superimposes the modulation signal (SM) on the control voltage (VC) of a voltage control oscillator (VCO) (54) of a PLL circuit (50); by these means it becomes possible to output a spread spectrum modulated output signal (CLv) under a specification desired by a user by storing in the memory (80) the modulation data (DM) that corresponds to the spread spectrum modulation the user tries to set.
摘要:
An oscillator operated with an external power source or an external save power source (Ves), comprises: a clock signal generation unit for generating and outputting a clock signal; a power-on detection unit (5) for detecting the power-on of the external power source; a power-off detection unit (6) for detecting the power-off of the external power source; a running time count unit (4) for counting the running time from the time a power-on detection signal is input to the time a power-off detection signal is input; storage means (9) for storing an accumulated running time up to the power-on time of the external power source; and a control unit (8) for reading the running time at the time of the power-off detection signal being input, reading the accumulated running time from the storage means (9), adding the running time to the accumulated running time, and storing the addition result as a new accumulated running time in the storage means (9).
摘要:
An oscillator with a noise reduction function is provided that can arbitrarily change the setting of a spread spectrum modulation and easily reduce the noise of electronic equipment, a writing device that can change the setting of the oscillator, and a control method of the writing device. The oscillator (10) has a memory (80) that stores modulation data (DM) for performing the spread spectrum modulation input from an output terminal (fout), a modulation signal output circuit (60) that generates a modulation signal (SM) from the modulation data (DM) stored in the memory (80), and a mixer (53) that superimposes the modulation signal (SM) on the control voltage (VC) of a voltage control oscillator (VCO) (54) of a PLL circuit (50); by these means it becomes possible to output a spread spectrum modulated output signal (CLv) under a specification desired by a user by storing in the memory (80) the modulation data (DM) that corresponds to the spread spectrum modulation the user tries to set.
摘要:
A piezoelectric oscillator comprises an oscillation stage (2) for generating pulses by exciting a piezoelectric resonator; and an output stage (13) for amplifying the pulses and outputting the amplified pulses. Start delay means responsive to electric power to the oscillator being turned on is provided for delaying the start of operation of the output stage (13) relative to that of the oscillation stage (2) by a delay time selected from a plurality of available delay times. Thus, the start characteristics of the oscillator are improved by reducing power noise being generated during a transient period after the power supply has been switched on.
摘要:
A piezoelectric oscillator comprises an oscillation stage (2) for generating pulses by exciting a piezoelectric resonator; and an output stage (13) for amplifying the pulses and outputting the amplified pulses. Start delay means responsive to electric power to the oscillator being turned on is provided for delaying the start of operation of the output stage (13) relative to that of the oscillation stage (2) by a delay time selected from a plurality of available delay times. Thus, the start characteristics of the oscillator are improved by reducing power noise being generated during a transient period after the power supply has been switched on.