公开(公告)号：US5047667A

公开(公告)日：1991-09-10

申请号：US467563

申请日：1990-01-19

Applicant: James B. Howie

Inventor： James B. Howie

IPC: G01R19/30

CPC classification number: G01R19/30

Abstract: A circuit is provided to detect which of a simultaneous plurality of varying input signals has the dominant maximum amplitude. Two simultaneous input signals are compared with each other; or each of more than two simultaneous input signals is compared individually with a common, varying, comparing signal, provided in response to the summing of the input signals, and the subsequent scaling of the summation. The input signals, and a provided comparing signal, are different from each other, only, in amplitude. Normally there is expected, at least in relation to the input signal having the dominant maximum amplitude, to be a wide dynamic extent of amplitudes; whereas each signal supplied to a difference amplifier for such a comparison is arranged to have only a low amplitude, at least the dominant input signal being supplied so as to have only a range of amplitudes, as transmitted by an associated limiting amplifier in response to the receipt of the signal. The rate of change with time of a varying signal amplitude, resulting from each comparison of two signals, substantially is proportional to the difference between the maximum amplitudes of the signals compared. Thus, the detector is arranged so as not to be required to operate upon the whole of said normally expected wide dynamic extent of amplitudes of at least the dominant input signal.

Abstract translation: 提供电路以检测同时多个变化的输入信号中的哪一个具有主要的最大幅度。 两个同时输入信号相互比较; 或者将两个以上的同时输入信号中的每一个单独地与响应于输入信号的相加提供的公共的，变化的比较信号以及随后的求和的缩放进行比较。 输入信号和所提供的比较信号在幅度上彼此不同。 通常，至少相对于具有主要最大幅度的输入信号，具有宽的动态幅度幅度; 而提供给用于这种比较的差分放大器的每个信号被布置为仅具有低幅度，至少主输入信号被提供以便仅具有由关联的限幅放大器响应于 收到信号。 由两个信号的每个比较产生的变化的信号幅度随时间的变化率基本上与所比较的信号的最大幅度之间的差成正比。 因此，检测器被布置成不需要在至少主导输入信号的整个所述正常预期的宽动态范围的幅度上进行操作。

公开(公告)号：US4345330A

公开(公告)日：1982-08-17

申请号：US140007

申请日：1980-04-14

Applicant: James B. Howie ,  John McLeod

Inventor： James B. Howie ,  John McLeod

IPC: H01S3/092 ,  H01S3/134 ,  H01S3/10

CPC classification number: H01S3/092 ,  H01S3/134

Abstract: A laser energy control circuit for a gas-discharge excited laser includes an energy source PSU to supply energy to the gas discharge. First circuit means TR1, TR2 operate to limit the energy supplied to a first value for a first time interval, after which second circuit means A1, A2 allow the energy to rise to a maximum value and then decrease gradually to a second value over a second time interval. Subsequently, third circuit means including amplifiers A3 to A6 operate to maintain the light output of the laser at a desired value.

Abstract translation: 用于气体放电激发激光器的激光能量控制电路包括向气体放电提供能量的能量源PSU。 第一电路装置TR1，TR2的作用是将提供给第一值的能量限制在第一时间间隔之后，之后第二电路装置A1，A2允许能量上升到最大值，然后逐渐减小到第二值 时间间隔。 随后，包括放大器A3至A6的第三电路装置操作以将激光器的光输出保持在期望值。