公开(公告)号：US3879683A

公开(公告)日：1975-04-22

申请号：US36754273

申请日：1973-06-06

Applicant: RCA CORP

Inventor： BOSSELAERS ROBERT JAN

IPC: H03K4/48 ,  H03K3/282

CPC classification number: H03K4/48

Abstract: First and second like resistances are serially connected across a reactance element. Where the reactance element is a capacitor, a constant voltage is applied to first one terminal and then to the other terminal of the capacitor such that the capacitor discharges and charges first in one direction and then in the opposite direction through the respective resistances. When the reactance element is an inductance, a constant voltage is applied to the inductance and the two resistances in a manner to alternately reverse the direction of flow of current through the inductance. A sawtooth wave is produced when the waveforms appearing at each terminal of the reactance element are summed together.

Abstract translation: 第一个和第二个像电阻串联连接在电抗元件上。 在电抗元件是电容器的情况下，将恒定电压施加到第一个端子，然后施加到电容器的另一个端子，使得电容器通过相应的电阻器在一个方向上首先在相反的方向上放电并充电。 当电抗元件是电感时，以一定的方式将电压和两个电阻施加恒定电压，以便交替地反转通过电感的电流的流动方向。 当出现在电抗元件的每个端子处的波形相加在一起时，产生锯齿波。

公开(公告)号：US3913028A

公开(公告)日：1975-10-14

申请号：US46277274

申请日：1974-04-22

Applicant: RCA CORP

Inventor： BOSSELAERS ROBERT JAN

IPC: H03L7/085 ,  H03L7/18 ,  H03B3/04

CPC classification number: H03L7/18 ,  H03L7/085

Abstract: A phase locked loop includes an arithmetic unit to add a first number (N1) to the contents of a storage register, included in the arithmetic unit, at a reference frequency (fR), and to subtract a second number (N2) from the contents of the storage register at a variable frequency (fV). The storage register is coupled to a voltage controlled oscillator which generates the variable frequency fV in accordance with the contents of the storage register. When the total of the additions of the nubmer N1 equals the total of the subtractions of the number N2 over a period of time, the contents of the storage register will remain substantially constant, and accordingly, variable frequency fV will equal a frequency directly proportional to

In a preferred embodiment, the values of N1 and N2 may be selectively programmed.